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Finding the Fourth Proportional to 615,703.20, 921,805.20 and 552,717.60

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Solution

The fourth proportional to 615,703.20, 921,805.20 and 552,717.60 is: 827,505.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    615,703.20 : 921,805.20 = 552,717.60 : x
  2. Step 2: Convert to fraction form
    615,703.20/921,805.20 = 552,717.60/x
  3. Step 3: Cross multiply
    615,703.20x = 921,805.20 × 552,717.60
  4. Step 4: Simplify right side
    615,703.20x = 509,497,957,811.52
  5. Step 5: Solve for x
    x = 509,497,957,811.52/615,703.20
  6. Step 6: Final answer
    x = 827,505.78

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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.