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Finding the Fourth Proportional to 772.45, 1,158.69 and 224.75

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Solution

The fourth proportional to 772.45, 1,158.69 and 224.75 is: 337.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    772.45 : 1,158.69 = 224.75 : x
  2. Step 2: Convert to fraction form
    772.45/1,158.69 = 224.75/x
  3. Step 3: Cross multiply
    772.45x = 1,158.69 × 224.75
  4. Step 4: Simplify right side
    772.45x = 260,415.58
  5. Step 5: Solve for x
    x = 260,415.58/772.45
  6. Step 6: Final answer
    x = 337.13

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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.