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Finding the Fourth Proportional to 872.52, 1,309.23 and 580.23

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Solution

The fourth proportional to 872.52, 1,309.23 and 580.23 is: 870.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    872.52 : 1,309.23 = 580.23 : x
  2. Step 2: Convert to fraction form
    872.52/1,309.23 = 580.23/x
  3. Step 3: Cross multiply
    872.52x = 1,309.23 × 580.23
  4. Step 4: Simplify right side
    872.52x = 759,646.55
  5. Step 5: Solve for x
    x = 759,646.55/872.52
  6. Step 6: Final answer
    x = 870.63

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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.