Home / 2,102.57-3,153.37-621.47

Finding the Fourth Proportional to 2,102.57, 3,153.37 and 621.47

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Solution

The fourth proportional to 2,102.57, 3,153.37 and 621.47 is: 932.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,102.57 : 3,153.37 = 621.47 : x
  2. Step 2: Convert to fraction form
    2,102.57/3,153.37 = 621.47/x
  3. Step 3: Cross multiply
    2,102.57x = 3,153.37 × 621.47
  4. Step 4: Simplify right side
    2,102.57x = 1,959,731.18
  5. Step 5: Solve for x
    x = 1,959,731.18/2,102.57
  6. Step 6: Final answer
    x = 932.07

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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.