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Finding the Fourth Proportional to 145.56, 217.36 and 144.71

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Solution

The fourth proportional to 145.56, 217.36 and 144.71 is: 216.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    145.56 : 217.36 = 144.71 : x
  2. Step 2: Convert to fraction form
    145.56/217.36 = 144.71/x
  3. Step 3: Cross multiply
    145.56x = 217.36 × 144.71
  4. Step 4: Simplify right side
    145.56x = 31,452.36
  5. Step 5: Solve for x
    x = 31,452.36/145.56
  6. Step 6: Final answer
    x = 216.08

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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.