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Finding the Fourth Proportional to 2,606.51, 3,909.78 and 658.71

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Solution

The fourth proportional to 2,606.51, 3,909.78 and 658.71 is: 988.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,606.51 : 3,909.78 = 658.71 : x
  2. Step 2: Convert to fraction form
    2,606.51/3,909.78 = 658.71/x
  3. Step 3: Cross multiply
    2,606.51x = 3,909.78 × 658.71
  4. Step 4: Simplify right side
    2,606.51x = 2,575,391.63
  5. Step 5: Solve for x
    x = 2,575,391.63/2,606.51
  6. Step 6: Final answer
    x = 988.06

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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.