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Finding the Fourth Proportional to 772.32, 1,065.77 and 523.53

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Solution

The fourth proportional to 772.32, 1,065.77 and 523.53 is: 722.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    772.32 : 1,065.77 = 523.53 : x
  2. Step 2: Convert to fraction form
    772.32/1,065.77 = 523.53/x
  3. Step 3: Cross multiply
    772.32x = 1,065.77 × 523.53
  4. Step 4: Simplify right side
    772.32x = 557,959.95
  5. Step 5: Solve for x
    x = 557,959.95/772.32
  6. Step 6: Final answer
    x = 722.45

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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.