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Finding the Fourth Proportional to 615,628.26, 923,734.80 and 426,379.86

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Solution

The fourth proportional to 615,628.26, 923,734.80 and 426,379.86 is: 639,772.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    615,628.26 : 923,734.80 = 426,379.86 : x
  2. Step 2: Convert to fraction form
    615,628.26/923,734.80 = 426,379.86/x
  3. Step 3: Cross multiply
    615,628.26x = 923,734.80 × 426,379.86
  4. Step 4: Simplify right side
    615,628.26x = 393,861,914,701.13
  5. Step 5: Solve for x
    x = 393,861,914,701.13/615,628.26
  6. Step 6: Final answer
    x = 639,772.31

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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.