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Finding the Fourth Proportional to 867.61, 1,197.42 and 552.77

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Solution

The fourth proportional to 867.61, 1,197.42 and 552.77 is: 762.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    867.61 : 1,197.42 = 552.77 : x
  2. Step 2: Convert to fraction form
    867.61/1,197.42 = 552.77/x
  3. Step 3: Cross multiply
    867.61x = 1,197.42 × 552.77
  4. Step 4: Simplify right side
    867.61x = 661,897.85
  5. Step 5: Solve for x
    x = 661,897.85/867.61
  6. Step 6: Final answer
    x = 762.90

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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.