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Finding the Fourth Proportional to 741.91, 1,024.92 and 612.31

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Solution

The fourth proportional to 741.91, 1,024.92 and 612.31 is: 845.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    741.91 : 1,024.92 = 612.31 : x
  2. Step 2: Convert to fraction form
    741.91/1,024.92 = 612.31/x
  3. Step 3: Cross multiply
    741.91x = 1,024.92 × 612.31
  4. Step 4: Simplify right side
    741.91x = 627,568.77
  5. Step 5: Solve for x
    x = 627,568.77/741.91
  6. Step 6: Final answer
    x = 845.88

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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.