Home / 2,102.67-3,153.51-621.90

Finding the Fourth Proportional to 2,102.67, 3,153.51 and 621.90

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Solution

The fourth proportional to 2,102.67, 3,153.51 and 621.90 is: 932.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,102.67 : 3,153.51 = 621.90 : x
  2. Step 2: Convert to fraction form
    2,102.67/3,153.51 = 621.90/x
  3. Step 3: Cross multiply
    2,102.67x = 3,153.51 × 621.90
  4. Step 4: Simplify right side
    2,102.67x = 1,961,167.87
  5. Step 5: Solve for x
    x = 1,961,167.87/2,102.67
  6. Step 6: Final answer
    x = 932.70

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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.