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Finding the Fourth Proportional to 233.74, 321.65 and 215.50

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Solution

The fourth proportional to 233.74, 321.65 and 215.50 is: 296.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    233.74 : 321.65 = 215.50 : x
  2. Step 2: Convert to fraction form
    233.74/321.65 = 215.50/x
  3. Step 3: Cross multiply
    233.74x = 321.65 × 215.50
  4. Step 4: Simplify right side
    233.74x = 69,315.58
  5. Step 5: Solve for x
    x = 69,315.58/233.74
  6. Step 6: Final answer
    x = 296.55

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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.