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Finding the Fourth Proportional to 4,654, 6,981 and 1,191.25

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Solution

The fourth proportional to 4,654, 6,981 and 1,191.25 is: 1,786.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,654 : 6,981 = 1,191.25 : x
  2. Step 2: Convert to fraction form
    4,654/6,981 = 1,191.25/x
  3. Step 3: Cross multiply
    4,654x = 6,981 × 1,191.25
  4. Step 4: Simplify right side
    4,654x = 8,316,116.25
  5. Step 5: Solve for x
    x = 8,316,116.25/4,654
  6. Step 6: Final answer
    x = 1,786.88

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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.