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Finding the Fourth Proportional to 615,120.40, 922,680.60 and 455,688.10

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Solution

The fourth proportional to 615,120.40, 922,680.60 and 455,688.10 is: 683,532.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    615,120.40 : 922,680.60 = 455,688.10 : x
  2. Step 2: Convert to fraction form
    615,120.40/922,680.60 = 455,688.10/x
  3. Step 3: Cross multiply
    615,120.40x = 922,680.60 × 455,688.10
  4. Step 4: Simplify right side
    615,120.40x = 420,454,569,520.86
  5. Step 5: Solve for x
    x = 420,454,569,520.86/615,120.40
  6. Step 6: Final answer
    x = 683,532.15

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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.