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Finding the Fourth Proportional to 935.93, 1,291.05 and 542.90

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Solution

The fourth proportional to 935.93, 1,291.05 and 542.90 is: 748.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    935.93 : 1,291.05 = 542.90 : x
  2. Step 2: Convert to fraction form
    935.93/1,291.05 = 542.90/x
  3. Step 3: Cross multiply
    935.93x = 1,291.05 × 542.90
  4. Step 4: Simplify right side
    935.93x = 700,904.59
  5. Step 5: Solve for x
    x = 700,904.59/935.93
  6. Step 6: Final answer
    x = 748.89

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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.