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Finding the Fourth Proportional to 947.99, 1,422.26 and 461.31

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Solution

The fourth proportional to 947.99, 1,422.26 and 461.31 is: 692.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    947.99 : 1,422.26 = 461.31 : x
  2. Step 2: Convert to fraction form
    947.99/1,422.26 = 461.31/x
  3. Step 3: Cross multiply
    947.99x = 1,422.26 × 461.31
  4. Step 4: Simplify right side
    947.99x = 656,100.45
  5. Step 5: Solve for x
    x = 656,100.45/947.99
  6. Step 6: Final answer
    x = 692.10

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Double scale
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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.