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Finding the Fourth Proportional to 529,318.70, 730,449.29 and 287,603.00

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Solution

The fourth proportional to 529,318.70, 730,449.29 and 287,603.00 is: 396,886.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    529,318.70 : 730,449.29 = 287,603.00 : x
  2. Step 2: Convert to fraction form
    529,318.70/730,449.29 = 287,603.00/x
  3. Step 3: Cross multiply
    529,318.70x = 730,449.29 × 287,603.00
  4. Step 4: Simplify right side
    529,318.70x = 210,079,406,935.42
  5. Step 5: Solve for x
    x = 210,079,406,935.42/529,318.70
  6. Step 6: Final answer
    x = 396,886.43

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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.