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Finding the Fourth Proportional to 580.44, 870.64 and 147.61

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Solution

The fourth proportional to 580.44, 870.64 and 147.61 is: 221.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    580.44 : 870.64 = 147.61 : x
  2. Step 2: Convert to fraction form
    580.44/870.64 = 147.61/x
  3. Step 3: Cross multiply
    580.44x = 870.64 × 147.61
  4. Step 4: Simplify right side
    580.44x = 128,515.35
  5. Step 5: Solve for x
    x = 128,515.35/580.44
  6. Step 6: Final answer
    x = 221.41

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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.