Home / 712,387.32-983,094.48-390,117.12

Finding the Fourth Proportional to 712,387.32, 983,094.48 and 390,117.12

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Solution

The fourth proportional to 712,387.32, 983,094.48 and 390,117.12 is: 538,361.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    712,387.32 : 983,094.48 = 390,117.12 : x
  2. Step 2: Convert to fraction form
    712,387.32/983,094.48 = 390,117.12/x
  3. Step 3: Cross multiply
    712,387.32x = 983,094.48 × 390,117.12
  4. Step 4: Simplify right side
    712,387.32x = 383,521,987,225.50
  5. Step 5: Solve for x
    x = 383,521,987,225.50/712,387.32
  6. Step 6: Final answer
    x = 538,361.61

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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 (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.