Home / 1,381.26-1,904.70-1,066.57

Finding the Fourth Proportional to 1,381.26, 1,904.70 and 1,066.57

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Solution

The fourth proportional to 1,381.26, 1,904.70 and 1,066.57 is: 1,470.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,381.26 : 1,904.70 = 1,066.57 : x
  2. Step 2: Convert to fraction form
    1,381.26/1,904.70 = 1,066.57/x
  3. Step 3: Cross multiply
    1,381.26x = 1,904.70 × 1,066.57
  4. Step 4: Simplify right side
    1,381.26x = 2,031,505.83
  5. Step 5: Solve for x
    x = 2,031,505.83/1,381.26
  6. Step 6: Final answer
    x = 1,470.76

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.