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Finding the Fourth Proportional to 772.68, 1,153.01 and 754.15

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Solution

The fourth proportional to 772.68, 1,153.01 and 754.15 is: 1,125.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    772.68 : 1,153.01 = 754.15 : x
  2. Step 2: Convert to fraction form
    772.68/1,153.01 = 754.15/x
  3. Step 3: Cross multiply
    772.68x = 1,153.01 × 754.15
  4. Step 4: Simplify right side
    772.68x = 869,542.49
  5. Step 5: Solve for x
    x = 869,542.49/772.68
  6. Step 6: Final answer
    x = 1,125.36

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.