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Finding the Fourth Proportional to 502,671.12, 693,409.32 and 318,572.88

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Solution

The fourth proportional to 502,671.12, 693,409.32 and 318,572.88 is: 439,455.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    502,671.12 : 693,409.32 = 318,572.88 : x
  2. Step 2: Convert to fraction form
    502,671.12/693,409.32 = 318,572.88/x
  3. Step 3: Cross multiply
    502,671.12x = 693,409.32 × 318,572.88
  4. Step 4: Simplify right side
    502,671.12x = 220,901,404,091.24
  5. Step 5: Solve for x
    x = 220,901,404,091.24/502,671.12
  6. Step 6: Final answer
    x = 439,455.13

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.