Home / 1,040.28-1,435.36-620.44

Finding the Fourth Proportional to 1,040.28, 1,435.36 and 620.44

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Solution

The fourth proportional to 1,040.28, 1,435.36 and 620.44 is: 856.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,040.28 : 1,435.36 = 620.44 : x
  2. Step 2: Convert to fraction form
    1,040.28/1,435.36 = 620.44/x
  3. Step 3: Cross multiply
    1,040.28x = 1,435.36 × 620.44
  4. Step 4: Simplify right side
    1,040.28x = 890,554.76
  5. Step 5: Solve for x
    x = 890,554.76/1,040.28
  6. Step 6: Final answer
    x = 856.07

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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.