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Finding the Fourth Proportional to 741.62, 1,024.45 and 671.76

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Solution

The fourth proportional to 741.62, 1,024.45 and 671.76 is: 927.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    741.62 : 1,024.45 = 671.76 : x
  2. Step 2: Convert to fraction form
    741.62/1,024.45 = 671.76/x
  3. Step 3: Cross multiply
    741.62x = 1,024.45 × 671.76
  4. Step 4: Simplify right side
    741.62x = 688,182.85
  5. Step 5: Solve for x
    x = 688,182.85/741.62
  6. Step 6: Final answer
    x = 927.94

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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.