Home / 1,248.10-1,872.90-517.60

Finding the Fourth Proportional to 1,248.10, 1,872.90 and 517.60

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Solution

The fourth proportional to 1,248.10, 1,872.90 and 517.60 is: 776.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,248.10 : 1,872.90 = 517.60 : x
  2. Step 2: Convert to fraction form
    1,248.10/1,872.90 = 517.60/x
  3. Step 3: Cross multiply
    1,248.10x = 1,872.90 × 517.60
  4. Step 4: Simplify right side
    1,248.10x = 969,413.04
  5. Step 5: Solve for x
    x = 969,413.04/1,248.10
  6. Step 6: Final answer
    x = 776.71

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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.