Home / 1,281.71-1,925.18-1,131.05

Finding the Fourth Proportional to 1,281.71, 1,925.18 and 1,131.05

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Solution

The fourth proportional to 1,281.71, 1,925.18 and 1,131.05 is: 1,698.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,281.71 : 1,925.18 = 1,131.05 : x
  2. Step 2: Convert to fraction form
    1,281.71/1,925.18 = 1,131.05/x
  3. Step 3: Cross multiply
    1,281.71x = 1,925.18 × 1,131.05
  4. Step 4: Simplify right side
    1,281.71x = 2,177,474.84
  5. Step 5: Solve for x
    x = 2,177,474.84/1,281.71
  6. Step 6: Final answer
    x = 1,698.88

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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.