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Finding the Fourth Proportional to 4,867.42, 6,717 and 2,978.68

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Solution

The fourth proportional to 4,867.42, 6,717 and 2,978.68 is: 4,110.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,867.42 : 6,717 = 2,978.68 : x
  2. Step 2: Convert to fraction form
    4,867.42/6,717 = 2,978.68/x
  3. Step 3: Cross multiply
    4,867.42x = 6,717 × 2,978.68
  4. Step 4: Simplify right side
    4,867.42x = 20,007,793.56
  5. Step 5: Solve for x
    x = 20,007,793.56/4,867.42
  6. Step 6: Final answer
    x = 4,110.55

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.