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Finding the Fourth Proportional to 1,395.65, 2,092.40 and 625.61

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Solution

The fourth proportional to 1,395.65, 2,092.40 and 625.61 is: 937.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,395.65 : 2,092.40 = 625.61 : x
  2. Step 2: Convert to fraction form
    1,395.65/2,092.40 = 625.61/x
  3. Step 3: Cross multiply
    1,395.65x = 2,092.40 × 625.61
  4. Step 4: Simplify right side
    1,395.65x = 1,309,023.24
  5. Step 5: Solve for x
    x = 1,309,023.24/1,395.65
  6. Step 6: Final answer
    x = 937.93

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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.