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Finding the Fourth Proportional to 580.50, 870.68 and 147.66

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Solution

The fourth proportional to 580.50, 870.68 and 147.66 is: 221.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    580.50 : 870.68 = 147.66 : x
  2. Step 2: Convert to fraction form
    580.50/870.68 = 147.66/x
  3. Step 3: Cross multiply
    580.50x = 870.68 × 147.66
  4. Step 4: Simplify right side
    580.50x = 128,564.61
  5. Step 5: Solve for x
    x = 128,564.61/580.50
  6. Step 6: Final answer
    x = 221.47

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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.