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Finding the Fourth Proportional to 529,028.19, 730,058.67 and 287,310.78

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Solution

The fourth proportional to 529,028.19, 730,058.67 and 287,310.78 is: 396,488.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    529,028.19 : 730,058.67 = 287,310.78 : x
  2. Step 2: Convert to fraction form
    529,028.19/730,058.67 = 287,310.78/x
  3. Step 3: Cross multiply
    529,028.19x = 730,058.67 × 287,310.78
  4. Step 4: Simplify right side
    529,028.19x = 209,753,725,923.46
  5. Step 5: Solve for x
    x = 209,753,725,923.46/529,028.19
  6. Step 6: Final answer
    x = 396,488.75

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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.