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Finding the Fourth Proportional to 772.50, 1,158.50 and 252.48

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Solution

The fourth proportional to 772.50, 1,158.50 and 252.48 is: 378.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    772.50 : 1,158.50 = 252.48 : x
  2. Step 2: Convert to fraction form
    772.50/1,158.50 = 252.48/x
  3. Step 3: Cross multiply
    772.50x = 1,158.50 × 252.48
  4. Step 4: Simplify right side
    772.50x = 292,498.08
  5. Step 5: Solve for x
    x = 292,498.08/772.50
  6. Step 6: Final answer
    x = 378.64

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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.