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Finding the Fourth Proportional to 4,789.85, 7,188.88 and 2,711.90

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Solution

The fourth proportional to 4,789.85, 7,188.88 and 2,711.90 is: 4,070.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,789.85 : 7,188.88 = 2,711.90 : x
  2. Step 2: Convert to fraction form
    4,789.85/7,188.88 = 2,711.90/x
  3. Step 3: Cross multiply
    4,789.85x = 7,188.88 × 2,711.90
  4. Step 4: Simplify right side
    4,789.85x = 19,495,498.92
  5. Step 5: Solve for x
    x = 19,495,498.92/4,789.85
  6. Step 6: Final answer
    x = 4,070.17

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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.