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Finding the Fourth Proportional to 851.33, 1,174.86 and 497.19

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Solution

The fourth proportional to 851.33, 1,174.86 and 497.19 is: 686.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    851.33 : 1,174.86 = 497.19 : x
  2. Step 2: Convert to fraction form
    851.33/1,174.86 = 497.19/x
  3. Step 3: Cross multiply
    851.33x = 1,174.86 × 497.19
  4. Step 4: Simplify right side
    851.33x = 584,128.64
  5. Step 5: Solve for x
    x = 584,128.64/851.33
  6. Step 6: Final answer
    x = 686.14

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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.