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Finding the Fourth Proportional to 145.17, 216.77 and 144.18

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Solution

The fourth proportional to 145.17, 216.77 and 144.18 is: 215.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    145.17 : 216.77 = 144.18 : x
  2. Step 2: Convert to fraction form
    145.17/216.77 = 144.18/x
  3. Step 3: Cross multiply
    145.17x = 216.77 × 144.18
  4. Step 4: Simplify right side
    145.17x = 31,253.18
  5. Step 5: Solve for x
    x = 31,253.18/145.17
  6. Step 6: Final answer
    x = 215.29

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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.