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Finding the Fourth Proportional to 245.68, 369.28 and 143.17

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Solution

The fourth proportional to 245.68, 369.28 and 143.17 is: 215.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    245.68 : 369.28 = 143.17 : x
  2. Step 2: Convert to fraction form
    245.68/369.28 = 143.17/x
  3. Step 3: Cross multiply
    245.68x = 369.28 × 143.17
  4. Step 4: Simplify right side
    245.68x = 52,869.82
  5. Step 5: Solve for x
    x = 52,869.82/245.68
  6. Step 6: Final answer
    x = 215.20

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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.