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Finding the Fourth Proportional to 1,060.74, 1,589.76 and 648.72

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Solution

The fourth proportional to 1,060.74, 1,589.76 and 648.72 is: 972.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,060.74 : 1,589.76 = 648.72 : x
  2. Step 2: Convert to fraction form
    1,060.74/1,589.76 = 648.72/x
  3. Step 3: Cross multiply
    1,060.74x = 1,589.76 × 648.72
  4. Step 4: Simplify right side
    1,060.74x = 1,031,309.11
  5. Step 5: Solve for x
    x = 1,031,309.11/1,060.74
  6. Step 6: Final answer
    x = 972.25

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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.