Home / 1,449.86-2,170.20-929.17

Finding the Fourth Proportional to 1,449.86, 2,170.20 and 929.17

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Solution

The fourth proportional to 1,449.86, 2,170.20 and 929.17 is: 1,390.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,449.86 : 2,170.20 = 929.17 : x
  2. Step 2: Convert to fraction form
    1,449.86/2,170.20 = 929.17/x
  3. Step 3: Cross multiply
    1,449.86x = 2,170.20 × 929.17
  4. Step 4: Simplify right side
    1,449.86x = 2,016,473.88
  5. Step 5: Solve for x
    x = 2,016,473.88/1,449.86
  6. Step 6: Final answer
    x = 1,390.81

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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.