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Finding the Fourth Proportional to 580.55, 870.82 and 147.71

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Solution

The fourth proportional to 580.55, 870.82 and 147.71 is: 221.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    580.55 : 870.82 = 147.71 : x
  2. Step 2: Convert to fraction form
    580.55/870.82 = 147.71/x
  3. Step 3: Cross multiply
    580.55x = 870.82 × 147.71
  4. Step 4: Simplify right side
    580.55x = 128,628.82
  5. Step 5: Solve for x
    x = 128,628.82/580.55
  6. Step 6: Final answer
    x = 221.56

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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.