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Finding the Fourth Proportional to 1,032.36, 1,425.90 and 752.15

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Solution

The fourth proportional to 1,032.36, 1,425.90 and 752.15 is: 1,038.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,032.36 : 1,425.90 = 752.15 : x
  2. Step 2: Convert to fraction form
    1,032.36/1,425.90 = 752.15/x
  3. Step 3: Cross multiply
    1,032.36x = 1,425.90 × 752.15
  4. Step 4: Simplify right side
    1,032.36x = 1,072,497.07
  5. Step 5: Solve for x
    x = 1,072,497.07/1,032.36
  6. Step 6: Final answer
    x = 1,038.88

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.