Home / 2,931.75-4,045.82-1,689.75

Finding the Fourth Proportional to 2,931.75, 4,045.82 and 1,689.75

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Solution

The fourth proportional to 2,931.75, 4,045.82 and 1,689.75 is: 2,331.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,931.75 : 4,045.82 = 1,689.75 : x
  2. Step 2: Convert to fraction form
    2,931.75/4,045.82 = 1,689.75/x
  3. Step 3: Cross multiply
    2,931.75x = 4,045.82 × 1,689.75
  4. Step 4: Simplify right side
    2,931.75x = 6,836,415.90
  5. Step 5: Solve for x
    x = 6,836,415.90/2,931.75
  6. Step 6: Final answer
    x = 2,331.86

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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.