Home / 1,040.88-1,426.23-1,031.28

Finding the Fourth Proportional to 1,040.88, 1,426.23 and 1,031.28

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Solution

The fourth proportional to 1,040.88, 1,426.23 and 1,031.28 is: 1,413.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,040.88 : 1,426.23 = 1,031.28 : x
  2. Step 2: Convert to fraction form
    1,040.88/1,426.23 = 1,031.28/x
  3. Step 3: Cross multiply
    1,040.88x = 1,426.23 × 1,031.28
  4. Step 4: Simplify right side
    1,040.88x = 1,470,842.47
  5. Step 5: Solve for x
    x = 1,470,842.47/1,040.88
  6. Step 6: Final answer
    x = 1,413.08

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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.