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Finding the Fourth Proportional to 748.38, 1,032.56 and 453.45

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Solution

The fourth proportional to 748.38, 1,032.56 and 453.45 is: 625.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    748.38 : 1,032.56 = 453.45 : x
  2. Step 2: Convert to fraction form
    748.38/1,032.56 = 453.45/x
  3. Step 3: Cross multiply
    748.38x = 1,032.56 × 453.45
  4. Step 4: Simplify right side
    748.38x = 468,212.06
  5. Step 5: Solve for x
    x = 468,212.06/748.38
  6. Step 6: Final answer
    x = 625.63

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1.5x scale

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.