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Finding the Fourth Proportional to 1,154.84, 1,593.71 and 689

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Solution

The fourth proportional to 1,154.84, 1,593.71 and 689 is: 950.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,154.84 : 1,593.71 = 689 : x
  2. Step 2: Convert to fraction form
    1,154.84/1,593.71 = 689/x
  3. Step 3: Cross multiply
    1,154.84x = 1,593.71 × 689
  4. Step 4: Simplify right side
    1,154.84x = 1,098,062.75
  5. Step 5: Solve for x
    x = 1,098,062.75/1,154.84
  6. Step 6: Final answer
    x = 950.84

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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.