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Finding the Fourth Proportional to 487,015.20, 730,522.80 and 434,138.40

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Solution

The fourth proportional to 487,015.20, 730,522.80 and 434,138.40 is: 651,207.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    487,015.20 : 730,522.80 = 434,138.40 : x
  2. Step 2: Convert to fraction form
    487,015.20/730,522.80 = 434,138.40/x
  3. Step 3: Cross multiply
    487,015.20x = 730,522.80 × 434,138.40
  4. Step 4: Simplify right side
    487,015.20x = 317,147,999,555.52
  5. Step 5: Solve for x
    x = 317,147,999,555.52/487,015.20
  6. Step 6: Final answer
    x = 651,207.60

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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.