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Finding the Fourth Proportional to 772.13, 1,156.05 and 401.15

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Solution

The fourth proportional to 772.13, 1,156.05 and 401.15 is: 600.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    772.13 : 1,156.05 = 401.15 : x
  2. Step 2: Convert to fraction form
    772.13/1,156.05 = 401.15/x
  3. Step 3: Cross multiply
    772.13x = 1,156.05 × 401.15
  4. Step 4: Simplify right side
    772.13x = 463,743.68
  5. Step 5: Solve for x
    x = 463,743.68/772.13
  6. Step 6: Final answer
    x = 600.61

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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.