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Finding the Fourth Proportional to 424.05, 585.69 and 319.60

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Solution

The fourth proportional to 424.05, 585.69 and 319.60 is: 441.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    424.05 : 585.69 = 319.60 : x
  2. Step 2: Convert to fraction form
    424.05/585.69 = 319.60/x
  3. Step 3: Cross multiply
    424.05x = 585.69 × 319.60
  4. Step 4: Simplify right side
    424.05x = 187,186.52
  5. Step 5: Solve for x
    x = 187,186.52/424.05
  6. Step 6: Final answer
    x = 441.43

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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.