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Finding the Fourth Proportional to 568,638.50, 785,036.32 and 387,616.41

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Solution

The fourth proportional to 568,638.50, 785,036.32 and 387,616.41 is: 535,125.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    568,638.50 : 785,036.32 = 387,616.41 : x
  2. Step 2: Convert to fraction form
    568,638.50/785,036.32 = 387,616.41/x
  3. Step 3: Cross multiply
    568,638.50x = 785,036.32 × 387,616.41
  4. Step 4: Simplify right side
    568,638.50x = 304,292,959,108.97
  5. Step 5: Solve for x
    x = 304,292,959,108.97/568,638.50
  6. Step 6: Final answer
    x = 535,125.50

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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.