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Finding the Fourth Proportional to 2,600.39, 3,900.54 and 652.59

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Solution

The fourth proportional to 2,600.39, 3,900.54 and 652.59 is: 978.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,600.39 : 3,900.54 = 652.59 : x
  2. Step 2: Convert to fraction form
    2,600.39/3,900.54 = 652.59/x
  3. Step 3: Cross multiply
    2,600.39x = 3,900.54 × 652.59
  4. Step 4: Simplify right side
    2,600.39x = 2,545,445.28
  5. Step 5: Solve for x
    x = 2,545,445.28/2,600.39
  6. Step 6: Final answer
    x = 978.87

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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.