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Finding the Fourth Proportional to 1,154.99, 1,593.38 and 781.83

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Solution

The fourth proportional to 1,154.99, 1,593.38 and 781.83 is: 1,078.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,154.99 : 1,593.38 = 781.83 : x
  2. Step 2: Convert to fraction form
    1,154.99/1,593.38 = 781.83/x
  3. Step 3: Cross multiply
    1,154.99x = 1,593.38 × 781.83
  4. Step 4: Simplify right side
    1,154.99x = 1,245,748.38
  5. Step 5: Solve for x
    x = 1,245,748.38/1,154.99
  6. Step 6: Final answer
    x = 1,078.58

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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.