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Finding the Fourth Proportional to 774.90, 1,162.17 and 637.38

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Solution

The fourth proportional to 774.90, 1,162.17 and 637.38 is: 955.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    774.90 : 1,162.17 = 637.38 : x
  2. Step 2: Convert to fraction form
    774.90/1,162.17 = 637.38/x
  3. Step 3: Cross multiply
    774.90x = 1,162.17 × 637.38
  4. Step 4: Simplify right side
    774.90x = 740,743.91
  5. Step 5: Solve for x
    x = 740,743.91/774.90
  6. Step 6: Final answer
    x = 955.92

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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.