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Finding the Fourth Proportional to 983.91, 1,475.78 and 334.61

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Solution

The fourth proportional to 983.91, 1,475.78 and 334.61 is: 501.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    983.91 : 1,475.78 = 334.61 : x
  2. Step 2: Convert to fraction form
    983.91/1,475.78 = 334.61/x
  3. Step 3: Cross multiply
    983.91x = 1,475.78 × 334.61
  4. Step 4: Simplify right side
    983.91x = 493,801.69
  5. Step 5: Solve for x
    x = 493,801.69/983.91
  6. Step 6: Final answer
    x = 501.88

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.