Home / 1,042.12-1,434.47-943.71

Finding the Fourth Proportional to 1,042.12, 1,434.47 and 943.71

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Solution

The fourth proportional to 1,042.12, 1,434.47 and 943.71 is: 1,299.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,042.12 : 1,434.47 = 943.71 : x
  2. Step 2: Convert to fraction form
    1,042.12/1,434.47 = 943.71/x
  3. Step 3: Cross multiply
    1,042.12x = 1,434.47 × 943.71
  4. Step 4: Simplify right side
    1,042.12x = 1,353,723.68
  5. Step 5: Solve for x
    x = 1,353,723.68/1,042.12
  6. Step 6: Final answer
    x = 1,299.01

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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.