Home / 287,604,689.40-431,407,034.10-239,774,999.40

Finding the Fourth Proportional to 287,604,689.40, 431,407,034.10 and 239,774,999.40

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Solution

The fourth proportional to 287,604,689.40, 431,407,034.10 and 239,774,999.40 is: 359,662,499.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,604,689.40 : 431,407,034.10 = 239,774,999.40 : x
  2. Step 2: Convert to fraction form
    287,604,689.40/431,407,034.10 = 239,774,999.40/x
  3. Step 3: Cross multiply
    287,604,689.40x = 431,407,034.10 × 239,774,999.40
  4. Step 4: Simplify right side
    287,604,689.40x = 103,440,621,342,483,280
  5. Step 5: Solve for x
    x = 103,440,621,342,483,280/287,604,689.40
  6. Step 6: Final answer
    x = 359,662,499.10

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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.