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Finding the Fourth Proportional to 851.30, 1,174.46 and 630.17

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Solution

The fourth proportional to 851.30, 1,174.46 and 630.17 is: 869.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    851.30 : 1,174.46 = 630.17 : x
  2. Step 2: Convert to fraction form
    851.30/1,174.46 = 630.17/x
  3. Step 3: Cross multiply
    851.30x = 1,174.46 × 630.17
  4. Step 4: Simplify right side
    851.30x = 740,109.46
  5. Step 5: Solve for x
    x = 740,109.46/851.30
  6. Step 6: Final answer
    x = 869.39

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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.