Home / 387,531.90-534,729.38-215,445.06

Finding the Fourth Proportional to 387,531.90, 534,729.38 and 215,445.06

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Solution

The fourth proportional to 387,531.90, 534,729.38 and 215,445.06 is: 297,278.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,531.90 : 534,729.38 = 215,445.06 : x
  2. Step 2: Convert to fraction form
    387,531.90/534,729.38 = 215,445.06/x
  3. Step 3: Cross multiply
    387,531.90x = 534,729.38 × 215,445.06
  4. Step 4: Simplify right side
    387,531.90x = 115,204,802,280.64
  5. Step 5: Solve for x
    x = 115,204,802,280.64/387,531.90
  6. Step 6: Final answer
    x = 297,278.24

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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.