Home / 4,781.25-7,171.88-1,318.50

Finding the Fourth Proportional to 4,781.25, 7,171.88 and 1,318.50

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Solution

The fourth proportional to 4,781.25, 7,171.88 and 1,318.50 is: 1,977.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,781.25 : 7,171.88 = 1,318.50 : x
  2. Step 2: Convert to fraction form
    4,781.25/7,171.88 = 1,318.50/x
  3. Step 3: Cross multiply
    4,781.25x = 7,171.88 × 1,318.50
  4. Step 4: Simplify right side
    4,781.25x = 9,456,117.19
  5. Step 5: Solve for x
    x = 9,456,117.19/4,781.25
  6. Step 6: Final answer
    x = 1,977.75

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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.