Home / 1,040.12-1,560.07-423.71

Finding the Fourth Proportional to 1,040.12, 1,560.07 and 423.71

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Solution

The fourth proportional to 1,040.12, 1,560.07 and 423.71 is: 635.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,040.12 : 1,560.07 = 423.71 : x
  2. Step 2: Convert to fraction form
    1,040.12/1,560.07 = 423.71/x
  3. Step 3: Cross multiply
    1,040.12x = 1,560.07 × 423.71
  4. Step 4: Simplify right side
    1,040.12x = 661,017.26
  5. Step 5: Solve for x
    x = 661,017.26/1,040.12
  6. Step 6: Final answer
    x = 635.52

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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.