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Finding the Fourth Proportional to 772.92, 1,064.70 and 625.14

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Solution

The fourth proportional to 772.92, 1,064.70 and 625.14 is: 861.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    772.92 : 1,064.70 = 625.14 : x
  2. Step 2: Convert to fraction form
    772.92/1,064.70 = 625.14/x
  3. Step 3: Cross multiply
    772.92x = 1,064.70 × 625.14
  4. Step 4: Simplify right side
    772.92x = 665,586.56
  5. Step 5: Solve for x
    x = 665,586.56/772.92
  6. Step 6: Final answer
    x = 861.13

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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.