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Finding the Fourth Proportional to 1,032.17, 1,425.20 and 678.33

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Solution

The fourth proportional to 1,032.17, 1,425.20 and 678.33 is: 936.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,032.17 : 1,425.20 = 678.33 : x
  2. Step 2: Convert to fraction form
    1,032.17/1,425.20 = 678.33/x
  3. Step 3: Cross multiply
    1,032.17x = 1,425.20 × 678.33
  4. Step 4: Simplify right side
    1,032.17x = 966,752.52
  5. Step 5: Solve for x
    x = 966,752.52/1,032.17
  6. Step 6: Final answer
    x = 936.63

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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.