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Finding the Fourth Proportional to 529,691.52, 730,988.76 and 287,990.34

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Solution

The fourth proportional to 529,691.52, 730,988.76 and 287,990.34 is: 397,434.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    529,691.52 : 730,988.76 = 287,990.34 : x
  2. Step 2: Convert to fraction form
    529,691.52/730,988.76 = 287,990.34/x
  3. Step 3: Cross multiply
    529,691.52x = 730,988.76 × 287,990.34
  4. Step 4: Simplify right side
    529,691.52x = 210,517,701,528.58
  5. Step 5: Solve for x
    x = 210,517,701,528.58/529,691.52
  6. Step 6: Final answer
    x = 397,434.53

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1.5x scale

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.