Home / 3,318.25-4,978.28-1,009.75

Finding the Fourth Proportional to 3,318.25, 4,978.28 and 1,009.75

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Solution

The fourth proportional to 3,318.25, 4,978.28 and 1,009.75 is: 1,514.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,318.25 : 4,978.28 = 1,009.75 : x
  2. Step 2: Convert to fraction form
    3,318.25/4,978.28 = 1,009.75/x
  3. Step 3: Cross multiply
    3,318.25x = 4,978.28 × 1,009.75
  4. Step 4: Simplify right side
    3,318.25x = 5,026,813.18
  5. Step 5: Solve for x
    x = 5,026,813.18/3,318.25
  6. Step 6: Final answer
    x = 1,514.90

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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.