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Finding the Fourth Proportional to 424.94, 585.45 and 319.86

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Solution

The fourth proportional to 424.94, 585.45 and 319.86 is: 440.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    424.94 : 585.45 = 319.86 : x
  2. Step 2: Convert to fraction form
    424.94/585.45 = 319.86/x
  3. Step 3: Cross multiply
    424.94x = 585.45 × 319.86
  4. Step 4: Simplify right side
    424.94x = 187,262.04
  5. Step 5: Solve for x
    x = 187,262.04/424.94
  6. Step 6: Final answer
    x = 440.68

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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.