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Finding the Fourth Proportional to 772.46, 1,065.06 and 536.61

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Solution

The fourth proportional to 772.46, 1,065.06 and 536.61 is: 739.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    772.46 : 1,065.06 = 536.61 : x
  2. Step 2: Convert to fraction form
    772.46/1,065.06 = 536.61/x
  3. Step 3: Cross multiply
    772.46x = 1,065.06 × 536.61
  4. Step 4: Simplify right side
    772.46x = 571,516.52
  5. Step 5: Solve for x
    x = 571,516.52/772.46
  6. Step 6: Final answer
    x = 739.87

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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.