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Finding the Fourth Proportional to 145.84, 217.14 and 144.72

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Solution

The fourth proportional to 145.84, 217.14 and 144.72 is: 215.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    145.84 : 217.14 = 144.72 : x
  2. Step 2: Convert to fraction form
    145.84/217.14 = 144.72/x
  3. Step 3: Cross multiply
    145.84x = 217.14 × 144.72
  4. Step 4: Simplify right side
    145.84x = 31,424.50
  5. Step 5: Solve for x
    x = 31,424.50/145.84
  6. Step 6: Final answer
    x = 215.47

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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.