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Finding the Fourth Proportional to 659.32, 988.87 and 242.77

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Solution

The fourth proportional to 659.32, 988.87 and 242.77 is: 364.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    659.32 : 988.87 = 242.77 : x
  2. Step 2: Convert to fraction form
    659.32/988.87 = 242.77/x
  3. Step 3: Cross multiply
    659.32x = 988.87 × 242.77
  4. Step 4: Simplify right side
    659.32x = 240,067.97
  5. Step 5: Solve for x
    x = 240,067.97/659.32
  6. Step 6: Final answer
    x = 364.11

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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.