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Finding the Fourth Proportional to 220.52, 303.70 and 215.74

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Solution

The fourth proportional to 220.52, 303.70 and 215.74 is: 297.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    220.52 : 303.70 = 215.74 : x
  2. Step 2: Convert to fraction form
    220.52/303.70 = 215.74/x
  3. Step 3: Cross multiply
    220.52x = 303.70 × 215.74
  4. Step 4: Simplify right side
    220.52x = 65,518.77
  5. Step 5: Solve for x
    x = 65,518.77/220.52
  6. Step 6: Final answer
    x = 297.11

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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.