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Finding the Fourth Proportional to 748.39, 1,032.60 and 429.21

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Solution

The fourth proportional to 748.39, 1,032.60 and 429.21 is: 592.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    748.39 : 1,032.60 = 429.21 : x
  2. Step 2: Convert to fraction form
    748.39/1,032.60 = 429.21/x
  3. Step 3: Cross multiply
    748.39x = 1,032.60 × 429.21
  4. Step 4: Simplify right side
    748.39x = 443,199.66
  5. Step 5: Solve for x
    x = 443,199.66/748.39
  6. Step 6: Final answer
    x = 592.21

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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.