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Finding the Fourth Proportional to 1,242.55, 1,862.83 and 625.69

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Solution

The fourth proportional to 1,242.55, 1,862.83 and 625.69 is: 938.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,242.55 : 1,862.83 = 625.69 : x
  2. Step 2: Convert to fraction form
    1,242.55/1,862.83 = 625.69/x
  3. Step 3: Cross multiply
    1,242.55x = 1,862.83 × 625.69
  4. Step 4: Simplify right side
    1,242.55x = 1,165,541.66
  5. Step 5: Solve for x
    x = 1,165,541.66/1,242.55
  6. Step 6: Final answer
    x = 938.03

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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.