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Finding the Fourth Proportional to 242.60, 334.40 and 216.50

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Solution

The fourth proportional to 242.60, 334.40 and 216.50 is: 298.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    242.60 : 334.40 = 216.50 : x
  2. Step 2: Convert to fraction form
    242.60/334.40 = 216.50/x
  3. Step 3: Cross multiply
    242.60x = 334.40 × 216.50
  4. Step 4: Simplify right side
    242.60x = 72,397.60
  5. Step 5: Solve for x
    x = 72,397.60/242.60
  6. Step 6: Final answer
    x = 298.42

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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.