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Finding the Fourth Proportional to 3,187.04, 4,780.56 and 878.56

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Solution

The fourth proportional to 3,187.04, 4,780.56 and 878.56 is: 1,317.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,187.04 : 4,780.56 = 878.56 : x
  2. Step 2: Convert to fraction form
    3,187.04/4,780.56 = 878.56/x
  3. Step 3: Cross multiply
    3,187.04x = 4,780.56 × 878.56
  4. Step 4: Simplify right side
    3,187.04x = 4,200,008.79
  5. Step 5: Solve for x
    x = 4,200,008.79/3,187.04
  6. Step 6: Final answer
    x = 1,317.84

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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.