Home / 1,040.29-1,434.96-620.36

Finding the Fourth Proportional to 1,040.29, 1,434.96 and 620.36

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Solution

The fourth proportional to 1,040.29, 1,434.96 and 620.36 is: 855.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,040.29 : 1,434.96 = 620.36 : x
  2. Step 2: Convert to fraction form
    1,040.29/1,434.96 = 620.36/x
  3. Step 3: Cross multiply
    1,040.29x = 1,434.96 × 620.36
  4. Step 4: Simplify right side
    1,040.29x = 890,191.79
  5. Step 5: Solve for x
    x = 890,191.79/1,040.29
  6. Step 6: Final answer
    x = 855.72

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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.