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Finding the Fourth Proportional to 387,336.64, 534,510.24 and 215,265.28

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Solution

The fourth proportional to 387,336.64, 534,510.24 and 215,265.28 is: 297,058.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,336.64 : 534,510.24 = 215,265.28 : x
  2. Step 2: Convert to fraction form
    387,336.64/534,510.24 = 215,265.28/x
  3. Step 3: Cross multiply
    387,336.64x = 534,510.24 × 215,265.28
  4. Step 4: Simplify right side
    387,336.64x = 115,061,496,476.47
  5. Step 5: Solve for x
    x = 115,061,496,476.47/387,336.64
  6. Step 6: Final answer
    x = 297,058.13

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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.