Home / 1,040.11-1,560.13-309.69

Finding the Fourth Proportional to 1,040.11, 1,560.13 and 309.69

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Solution

The fourth proportional to 1,040.11, 1,560.13 and 309.69 is: 464.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,040.11 : 1,560.13 = 309.69 : x
  2. Step 2: Convert to fraction form
    1,040.11/1,560.13 = 309.69/x
  3. Step 3: Cross multiply
    1,040.11x = 1,560.13 × 309.69
  4. Step 4: Simplify right side
    1,040.11x = 483,155.89
  5. Step 5: Solve for x
    x = 483,155.89/1,040.11
  6. Step 6: Final answer
    x = 464.52

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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.