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Finding the Fourth Proportional to 1,327.23, 1,990.91 and 494.10

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Solution

The fourth proportional to 1,327.23, 1,990.91 and 494.10 is: 741.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,327.23 : 1,990.91 = 494.10 : x
  2. Step 2: Convert to fraction form
    1,327.23/1,990.91 = 494.10/x
  3. Step 3: Cross multiply
    1,327.23x = 1,990.91 × 494.10
  4. Step 4: Simplify right side
    1,327.23x = 983,708.63
  5. Step 5: Solve for x
    x = 983,708.63/1,327.23
  6. Step 6: Final answer
    x = 741.17

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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.