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Finding the Fourth Proportional to 773.28, 1,158.39 and 465.21

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Solution

The fourth proportional to 773.28, 1,158.39 and 465.21 is: 696.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    773.28 : 1,158.39 = 465.21 : x
  2. Step 2: Convert to fraction form
    773.28/1,158.39 = 465.21/x
  3. Step 3: Cross multiply
    773.28x = 1,158.39 × 465.21
  4. Step 4: Simplify right side
    773.28x = 538,894.61
  5. Step 5: Solve for x
    x = 538,894.61/773.28
  6. Step 6: Final answer
    x = 696.89

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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.