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Finding the Fourth Proportional to 746.43, 1,120.20 and 356.43

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Solution

The fourth proportional to 746.43, 1,120.20 and 356.43 is: 534.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    746.43 : 1,120.20 = 356.43 : x
  2. Step 2: Convert to fraction form
    746.43/1,120.20 = 356.43/x
  3. Step 3: Cross multiply
    746.43x = 1,120.20 × 356.43
  4. Step 4: Simplify right side
    746.43x = 399,275.69
  5. Step 5: Solve for x
    x = 399,275.69/746.43
  6. Step 6: Final answer
    x = 534.91

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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.