Home / 1,042.68-1,429.77-1,007.75

Finding the Fourth Proportional to 1,042.68, 1,429.77 and 1,007.75

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Solution

The fourth proportional to 1,042.68, 1,429.77 and 1,007.75 is: 1,381.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,042.68 : 1,429.77 = 1,007.75 : x
  2. Step 2: Convert to fraction form
    1,042.68/1,429.77 = 1,007.75/x
  3. Step 3: Cross multiply
    1,042.68x = 1,429.77 × 1,007.75
  4. Step 4: Simplify right side
    1,042.68x = 1,440,858.07
  5. Step 5: Solve for x
    x = 1,440,858.07/1,042.68
  6. Step 6: Final answer
    x = 1,381.87

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.