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Finding the Fourth Proportional to 147.60, 220.40 and 144.88

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Solution

The fourth proportional to 147.60, 220.40 and 144.88 is: 216.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    147.60 : 220.40 = 144.88 : x
  2. Step 2: Convert to fraction form
    147.60/220.40 = 144.88/x
  3. Step 3: Cross multiply
    147.60x = 220.40 × 144.88
  4. Step 4: Simplify right side
    147.60x = 31,931.55
  5. Step 5: Solve for x
    x = 31,931.55/147.60
  6. Step 6: Final answer
    x = 216.34

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.