Home / 1,040.18-1,435.44-620.81

Finding the Fourth Proportional to 1,040.18, 1,435.44 and 620.81

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Solution

The fourth proportional to 1,040.18, 1,435.44 and 620.81 is: 856.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,040.18 : 1,435.44 = 620.81 : x
  2. Step 2: Convert to fraction form
    1,040.18/1,435.44 = 620.81/x
  3. Step 3: Cross multiply
    1,040.18x = 1,435.44 × 620.81
  4. Step 4: Simplify right side
    1,040.18x = 891,128.33
  5. Step 5: Solve for x
    x = 891,128.33/1,040.18
  6. Step 6: Final answer
    x = 856.70

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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.