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Finding the Fourth Proportional to 783.39, 1,174.13 and 494.91

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Solution

The fourth proportional to 783.39, 1,174.13 and 494.91 is: 741.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    783.39 : 1,174.13 = 494.91 : x
  2. Step 2: Convert to fraction form
    783.39/1,174.13 = 494.91/x
  3. Step 3: Cross multiply
    783.39x = 1,174.13 × 494.91
  4. Step 4: Simplify right side
    783.39x = 581,086.20
  5. Step 5: Solve for x
    x = 581,086.20/783.39
  6. Step 6: Final answer
    x = 741.76

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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.