Home / 1,043.20-1,428.92-1,040.32

Finding the Fourth Proportional to 1,043.20, 1,428.92 and 1,040.32

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Solution

The fourth proportional to 1,043.20, 1,428.92 and 1,040.32 is: 1,424.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,043.20 : 1,428.92 = 1,040.32 : x
  2. Step 2: Convert to fraction form
    1,043.20/1,428.92 = 1,040.32/x
  3. Step 3: Cross multiply
    1,043.20x = 1,428.92 × 1,040.32
  4. Step 4: Simplify right side
    1,043.20x = 1,486,534.05
  5. Step 5: Solve for x
    x = 1,486,534.05/1,043.20
  6. Step 6: Final answer
    x = 1,424.98

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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.