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Finding the Fourth Proportional to 1,327.31, 1,990.97 and 461.63

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Solution

The fourth proportional to 1,327.31, 1,990.97 and 461.63 is: 692.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,327.31 : 1,990.97 = 461.63 : x
  2. Step 2: Convert to fraction form
    1,327.31/1,990.97 = 461.63/x
  3. Step 3: Cross multiply
    1,327.31x = 1,990.97 × 461.63
  4. Step 4: Simplify right side
    1,327.31x = 919,080.95
  5. Step 5: Solve for x
    x = 919,080.95/1,327.31
  6. Step 6: Final answer
    x = 692.44

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1.5x scale

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.