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Finding the Fourth Proportional to 2,083.48, 3,124.88 and 697.78

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Solution

The fourth proportional to 2,083.48, 3,124.88 and 697.78 is: 1,046.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,083.48 : 3,124.88 = 697.78 : x
  2. Step 2: Convert to fraction form
    2,083.48/3,124.88 = 697.78/x
  3. Step 3: Cross multiply
    2,083.48x = 3,124.88 × 697.78
  4. Step 4: Simplify right side
    2,083.48x = 2,180,478.77
  5. Step 5: Solve for x
    x = 2,180,478.77/2,083.48
  6. Step 6: Final answer
    x = 1,046.56

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1.5x scale

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.