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Finding the Fourth Proportional to 477.33, 658.75 and 311.99

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Solution

The fourth proportional to 477.33, 658.75 and 311.99 is: 430.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    477.33 : 658.75 = 311.99 : x
  2. Step 2: Convert to fraction form
    477.33/658.75 = 311.99/x
  3. Step 3: Cross multiply
    477.33x = 658.75 × 311.99
  4. Step 4: Simplify right side
    477.33x = 205,523.41
  5. Step 5: Solve for x
    x = 205,523.41/477.33
  6. Step 6: Final answer
    x = 430.57

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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.