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Finding the Fourth Proportional to 615,624.48, 923,729.28 and 426,376.08

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Solution

The fourth proportional to 615,624.48, 923,729.28 and 426,376.08 is: 639,766.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    615,624.48 : 923,729.28 = 426,376.08 : x
  2. Step 2: Convert to fraction form
    615,624.48/923,729.28 = 426,376.08/x
  3. Step 3: Cross multiply
    615,624.48x = 923,729.28 × 426,376.08
  4. Step 4: Simplify right side
    615,624.48x = 393,856,069,387.62
  5. Step 5: Solve for x
    x = 393,856,069,387.62/615,624.48
  6. Step 6: Final answer
    x = 639,766.74

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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.