Home / 1,040.33-1,560.75-309.90

Finding the Fourth Proportional to 1,040.33, 1,560.75 and 309.90

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Solution

The fourth proportional to 1,040.33, 1,560.75 and 309.90 is: 464.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,040.33 : 1,560.75 = 309.90 : x
  2. Step 2: Convert to fraction form
    1,040.33/1,560.75 = 309.90/x
  3. Step 3: Cross multiply
    1,040.33x = 1,560.75 × 309.90
  4. Step 4: Simplify right side
    1,040.33x = 483,676.43
  5. Step 5: Solve for x
    x = 483,676.43/1,040.33
  6. Step 6: Final answer
    x = 464.93

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.