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Finding the Fourth Proportional to 529,408.71, 730,582.47 and 287,691.35

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Solution

The fourth proportional to 529,408.71, 730,582.47 and 287,691.35 is: 397,013.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    529,408.71 : 730,582.47 = 287,691.35 : x
  2. Step 2: Convert to fraction form
    529,408.71/730,582.47 = 287,691.35/x
  3. Step 3: Cross multiply
    529,408.71x = 730,582.47 × 287,691.35
  4. Step 4: Simplify right side
    529,408.71x = 210,182,253,427.72
  5. Step 5: Solve for x
    x = 210,182,253,427.72/529,408.71
  6. Step 6: Final answer
    x = 397,013.21

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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.