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Finding the Fourth Proportional to 543,612.40, 815,418.60 and 459,631.60

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Solution

The fourth proportional to 543,612.40, 815,418.60 and 459,631.60 is: 689,447.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    543,612.40 : 815,418.60 = 459,631.60 : x
  2. Step 2: Convert to fraction form
    543,612.40/815,418.60 = 459,631.60/x
  3. Step 3: Cross multiply
    543,612.40x = 815,418.60 × 459,631.60
  4. Step 4: Simplify right side
    543,612.40x = 374,792,155,787.76
  5. Step 5: Solve for x
    x = 374,792,155,787.76/543,612.40
  6. Step 6: Final answer
    x = 689,447.40

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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.