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Finding the Fourth Proportional to 458.75, 633.16 and 311.43

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Solution

The fourth proportional to 458.75, 633.16 and 311.43 is: 429.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    458.75 : 633.16 = 311.43 : x
  2. Step 2: Convert to fraction form
    458.75/633.16 = 311.43/x
  3. Step 3: Cross multiply
    458.75x = 633.16 × 311.43
  4. Step 4: Simplify right side
    458.75x = 197,185.02
  5. Step 5: Solve for x
    x = 197,185.02/458.75
  6. Step 6: Final answer
    x = 429.83

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Find fourth proportional to 229.38, 316.58 and 155.72
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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.