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Finding the Fourth Proportional to 772.17, 1,158.47 and 382.29

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Solution

The fourth proportional to 772.17, 1,158.47 and 382.29 is: 573.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    772.17 : 1,158.47 = 382.29 : x
  2. Step 2: Convert to fraction form
    772.17/1,158.47 = 382.29/x
  3. Step 3: Cross multiply
    772.17x = 1,158.47 × 382.29
  4. Step 4: Simplify right side
    772.17x = 442,866.67
  5. Step 5: Solve for x
    x = 442,866.67/772.17
  6. Step 6: Final answer
    x = 573.54

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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.