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Finding the Fourth Proportional to 659,672.10, 989,508.15 and 260,180.10

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Solution

The fourth proportional to 659,672.10, 989,508.15 and 260,180.10 is: 390,270.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    659,672.10 : 989,508.15 = 260,180.10 : x
  2. Step 2: Convert to fraction form
    659,672.10/989,508.15 = 260,180.10/x
  3. Step 3: Cross multiply
    659,672.10x = 989,508.15 × 260,180.10
  4. Step 4: Simplify right side
    659,672.10x = 257,450,329,417.82
  5. Step 5: Solve for x
    x = 257,450,329,417.82/659,672.10
  6. Step 6: Final answer
    x = 390,270.15

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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.