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Finding the Fourth Proportional to 772.82, 1,158.12 and 580.58

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Solution

The fourth proportional to 772.82, 1,158.12 and 580.58 is: 870.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    772.82 : 1,158.12 = 580.58 : x
  2. Step 2: Convert to fraction form
    772.82/1,158.12 = 580.58/x
  3. Step 3: Cross multiply
    772.82x = 1,158.12 × 580.58
  4. Step 4: Simplify right side
    772.82x = 672,381.31
  5. Step 5: Solve for x
    x = 672,381.31/772.82
  6. Step 6: Final answer
    x = 870.04

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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.