Home / 1,040.18-1,435.29-620.53

Finding the Fourth Proportional to 1,040.18, 1,435.29 and 620.53

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Solution

The fourth proportional to 1,040.18, 1,435.29 and 620.53 is: 856.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,040.18 : 1,435.29 = 620.53 : x
  2. Step 2: Convert to fraction form
    1,040.18/1,435.29 = 620.53/x
  3. Step 3: Cross multiply
    1,040.18x = 1,435.29 × 620.53
  4. Step 4: Simplify right side
    1,040.18x = 890,640.50
  5. Step 5: Solve for x
    x = 890,640.50/1,040.18
  6. Step 6: Final answer
    x = 856.24

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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.