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Finding the Fourth Proportional to 458.81, 633.27 and 311.60

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Solution

The fourth proportional to 458.81, 633.27 and 311.60 is: 430.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    458.81 : 633.27 = 311.60 : x
  2. Step 2: Convert to fraction form
    458.81/633.27 = 311.60/x
  3. Step 3: Cross multiply
    458.81x = 633.27 × 311.60
  4. Step 4: Simplify right side
    458.81x = 197,326.93
  5. Step 5: Solve for x
    x = 197,326.93/458.81
  6. Step 6: Final answer
    x = 430.08

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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.