Home / 1,434.70-1,979.31-1,040.86

Finding the Fourth Proportional to 1,434.70, 1,979.31 and 1,040.86

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Solution

The fourth proportional to 1,434.70, 1,979.31 and 1,040.86 is: 1,435.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,434.70 : 1,979.31 = 1,040.86 : x
  2. Step 2: Convert to fraction form
    1,434.70/1,979.31 = 1,040.86/x
  3. Step 3: Cross multiply
    1,434.70x = 1,979.31 × 1,040.86
  4. Step 4: Simplify right side
    1,434.70x = 2,060,184.61
  5. Step 5: Solve for x
    x = 2,060,184.61/1,434.70
  6. Step 6: Final answer
    x = 1,435.97

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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.