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Finding the Fourth Proportional to 214.80, 296.22 and 156.17

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Solution

The fourth proportional to 214.80, 296.22 and 156.17 is: 215.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    214.80 : 296.22 = 156.17 : x
  2. Step 2: Convert to fraction form
    214.80/296.22 = 156.17/x
  3. Step 3: Cross multiply
    214.80x = 296.22 × 156.17
  4. Step 4: Simplify right side
    214.80x = 46,259.20
  5. Step 5: Solve for x
    x = 46,259.20/214.80
  6. Step 6: Final answer
    x = 215.36

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.