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Finding the Fourth Proportional to 310.23, 465.21 and 117.72

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Solution

The fourth proportional to 310.23, 465.21 and 117.72 is: 176.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    310.23 : 465.21 = 117.72 : x
  2. Step 2: Convert to fraction form
    310.23/465.21 = 117.72/x
  3. Step 3: Cross multiply
    310.23x = 465.21 × 117.72
  4. Step 4: Simplify right side
    310.23x = 54,764.52
  5. Step 5: Solve for x
    x = 54,764.52/310.23
  6. Step 6: Final answer
    x = 176.53

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.