Home / 1,421.15-2,131.85-497.95

Finding the Fourth Proportional to 1,421.15, 2,131.85 and 497.95

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Solution

The fourth proportional to 1,421.15, 2,131.85 and 497.95 is: 746.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,421.15 : 2,131.85 = 497.95 : x
  2. Step 2: Convert to fraction form
    1,421.15/2,131.85 = 497.95/x
  3. Step 3: Cross multiply
    1,421.15x = 2,131.85 × 497.95
  4. Step 4: Simplify right side
    1,421.15x = 1,061,550.62
  5. Step 5: Solve for x
    x = 1,061,550.62/1,421.15
  6. Step 6: Final answer
    x = 746.97

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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.