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Finding the Fourth Proportional to 837.41, 1,155.80 and 557.66

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Solution

The fourth proportional to 837.41, 1,155.80 and 557.66 is: 769.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    837.41 : 1,155.80 = 557.66 : x
  2. Step 2: Convert to fraction form
    837.41/1,155.80 = 557.66/x
  3. Step 3: Cross multiply
    837.41x = 1,155.80 × 557.66
  4. Step 4: Simplify right side
    837.41x = 644,534.86
  5. Step 5: Solve for x
    x = 644,534.86/837.41
  6. Step 6: Final answer
    x = 769.68

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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.