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Finding the Fourth Proportional to 445.48, 614.96 and 317.80

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Solution

The fourth proportional to 445.48, 614.96 and 317.80 is: 438.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    445.48 : 614.96 = 317.80 : x
  2. Step 2: Convert to fraction form
    445.48/614.96 = 317.80/x
  3. Step 3: Cross multiply
    445.48x = 614.96 × 317.80
  4. Step 4: Simplify right side
    445.48x = 195,434.29
  5. Step 5: Solve for x
    x = 195,434.29/445.48
  6. Step 6: Final answer
    x = 438.71

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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.