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Finding the Fourth Proportional to 630.70, 947.43 and 449.26

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Solution

The fourth proportional to 630.70, 947.43 and 449.26 is: 674.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    630.70 : 947.43 = 449.26 : x
  2. Step 2: Convert to fraction form
    630.70/947.43 = 449.26/x
  3. Step 3: Cross multiply
    630.70x = 947.43 × 449.26
  4. Step 4: Simplify right side
    630.70x = 425,642.40
  5. Step 5: Solve for x
    x = 425,642.40/630.70
  6. Step 6: Final answer
    x = 674.87

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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.