Home / 1,421.02-2,131.70-496.90

Finding the Fourth Proportional to 1,421.02, 2,131.70 and 496.90

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Solution

The fourth proportional to 1,421.02, 2,131.70 and 496.90 is: 745.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,421.02 : 2,131.70 = 496.90 : x
  2. Step 2: Convert to fraction form
    1,421.02/2,131.70 = 496.90/x
  3. Step 3: Cross multiply
    1,421.02x = 2,131.70 × 496.90
  4. Step 4: Simplify right side
    1,421.02x = 1,059,241.73
  5. Step 5: Solve for x
    x = 1,059,241.73/1,421.02
  6. Step 6: Final answer
    x = 745.41

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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.