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Finding the Fourth Proportional to 615,672.30, 922,633.65 and 428,465.10

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Solution

The fourth proportional to 615,672.30, 922,633.65 and 428,465.10 is: 642,088.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    615,672.30 : 922,633.65 = 428,465.10 : x
  2. Step 2: Convert to fraction form
    615,672.30/922,633.65 = 428,465.10/x
  3. Step 3: Cross multiply
    615,672.30x = 922,633.65 × 428,465.10
  4. Step 4: Simplify right side
    615,672.30x = 395,316,319,110.62
  5. Step 5: Solve for x
    x = 395,316,319,110.62/615,672.30
  6. Step 6: Final answer
    x = 642,088.85

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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.