Home / 1,209.43-1,811.85-1,015.71

Finding the Fourth Proportional to 1,209.43, 1,811.85 and 1,015.71

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Solution

The fourth proportional to 1,209.43, 1,811.85 and 1,015.71 is: 1,521.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,209.43 : 1,811.85 = 1,015.71 : x
  2. Step 2: Convert to fraction form
    1,209.43/1,811.85 = 1,015.71/x
  3. Step 3: Cross multiply
    1,209.43x = 1,811.85 × 1,015.71
  4. Step 4: Simplify right side
    1,209.43x = 1,840,314.16
  5. Step 5: Solve for x
    x = 1,840,314.16/1,209.43
  6. Step 6: Final answer
    x = 1,521.64

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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.