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Finding the Fourth Proportional to 861,554, 1,292,540.28 and 270,578

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Solution

The fourth proportional to 861,554, 1,292,540.28 and 270,578 is: 405,932.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    861,554 : 1,292,540.28 = 270,578 : x
  2. Step 2: Convert to fraction form
    861,554/1,292,540.28 = 270,578/x
  3. Step 3: Cross multiply
    861,554x = 1,292,540.28 × 270,578
  4. Step 4: Simplify right side
    861,554x = 349,732,963,881.84
  5. Step 5: Solve for x
    x = 349,732,963,881.84/861,554
  6. Step 6: Final answer
    x = 405,932.73

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.