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Finding the Fourth Proportional to 4,655.88, 6,981.76 and 2,191.40

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Solution

The fourth proportional to 4,655.88, 6,981.76 and 2,191.40 is: 3,286.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,655.88 : 6,981.76 = 2,191.40 : x
  2. Step 2: Convert to fraction form
    4,655.88/6,981.76 = 2,191.40/x
  3. Step 3: Cross multiply
    4,655.88x = 6,981.76 × 2,191.40
  4. Step 4: Simplify right side
    4,655.88x = 15,299,828.86
  5. Step 5: Solve for x
    x = 15,299,828.86/4,655.88
  6. Step 6: Final answer
    x = 3,286.13

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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.