Home / 1,040.31-1,436.13-709.29

Finding the Fourth Proportional to 1,040.31, 1,436.13 and 709.29

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Solution

The fourth proportional to 1,040.31, 1,436.13 and 709.29 is: 979.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,040.31 : 1,436.13 = 709.29 : x
  2. Step 2: Convert to fraction form
    1,040.31/1,436.13 = 709.29/x
  3. Step 3: Cross multiply
    1,040.31x = 1,436.13 × 709.29
  4. Step 4: Simplify right side
    1,040.31x = 1,018,632.65
  5. Step 5: Solve for x
    x = 1,018,632.65/1,040.31
  6. Step 6: Final answer
    x = 979.16

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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.