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Finding the Fourth Proportional to 4,909.64, 7,364.46 and 1,987.96

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Solution

The fourth proportional to 4,909.64, 7,364.46 and 1,987.96 is: 2,981.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,909.64 : 7,364.46 = 1,987.96 : x
  2. Step 2: Convert to fraction form
    4,909.64/7,364.46 = 1,987.96/x
  3. Step 3: Cross multiply
    4,909.64x = 7,364.46 × 1,987.96
  4. Step 4: Simplify right side
    4,909.64x = 14,640,251.90
  5. Step 5: Solve for x
    x = 14,640,251.90/4,909.64
  6. Step 6: Final answer
    x = 2,981.94

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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.