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Finding the Fourth Proportional to 659.76, 986.73 and 587.15

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Solution

The fourth proportional to 659.76, 986.73 and 587.15 is: 878.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    659.76 : 986.73 = 587.15 : x
  2. Step 2: Convert to fraction form
    659.76/986.73 = 587.15/x
  3. Step 3: Cross multiply
    659.76x = 986.73 × 587.15
  4. Step 4: Simplify right side
    659.76x = 579,355.58
  5. Step 5: Solve for x
    x = 579,355.58/659.76
  6. Step 6: Final answer
    x = 878.13

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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.