Home / 1,421.08-2,131.88-496.60

Finding the Fourth Proportional to 1,421.08, 2,131.88 and 496.60

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Solution

The fourth proportional to 1,421.08, 2,131.88 and 496.60 is: 744.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,421.08 : 2,131.88 = 496.60 : x
  2. Step 2: Convert to fraction form
    1,421.08/2,131.88 = 496.60/x
  3. Step 3: Cross multiply
    1,421.08x = 2,131.88 × 496.60
  4. Step 4: Simplify right side
    1,421.08x = 1,058,691.61
  5. Step 5: Solve for x
    x = 1,058,691.61/1,421.08
  6. Step 6: Final answer
    x = 744.99

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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.