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Finding the Fourth Proportional to 2,606.16, 3,909.30 and 658.38

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Solution

The fourth proportional to 2,606.16, 3,909.30 and 658.38 is: 987.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,606.16 : 3,909.30 = 658.38 : x
  2. Step 2: Convert to fraction form
    2,606.16/3,909.30 = 658.38/x
  3. Step 3: Cross multiply
    2,606.16x = 3,909.30 × 658.38
  4. Step 4: Simplify right side
    2,606.16x = 2,573,804.93
  5. Step 5: Solve for x
    x = 2,573,804.93/2,606.16
  6. Step 6: Final answer
    x = 987.59

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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.