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Finding the Fourth Proportional to 580.32, 870.48 and 147.48

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Solution

The fourth proportional to 580.32, 870.48 and 147.48 is: 221.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    580.32 : 870.48 = 147.48 : x
  2. Step 2: Convert to fraction form
    580.32/870.48 = 147.48/x
  3. Step 3: Cross multiply
    580.32x = 870.48 × 147.48
  4. Step 4: Simplify right side
    580.32x = 128,378.39
  5. Step 5: Solve for x
    x = 128,378.39/580.32
  6. Step 6: Final answer
    x = 221.22

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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.