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Finding the Fourth Proportional to 216.60, 299.27 and 215.06

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Solution

The fourth proportional to 216.60, 299.27 and 215.06 is: 297.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    216.60 : 299.27 = 215.06 : x
  2. Step 2: Convert to fraction form
    216.60/299.27 = 215.06/x
  3. Step 3: Cross multiply
    216.60x = 299.27 × 215.06
  4. Step 4: Simplify right side
    216.60x = 64,358.43
  5. Step 5: Solve for x
    x = 64,358.43/216.60
  6. Step 6: Final answer
    x = 297.13

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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.