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Finding the Fourth Proportional to 4,909.80, 6,650.10 and 4,909.80

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Solution

The fourth proportional to 4,909.80, 6,650.10 and 4,909.80 is: 6,650.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,909.80 : 6,650.10 = 4,909.80 : x
  2. Step 2: Convert to fraction form
    4,909.80/6,650.10 = 4,909.80/x
  3. Step 3: Cross multiply
    4,909.80x = 6,650.10 × 4,909.80
  4. Step 4: Simplify right side
    4,909.80x = 32,650,660.98
  5. Step 5: Solve for x
    x = 32,650,660.98/4,909.80
  6. Step 6: Final answer
    x = 6,650.10

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Why These Related Problems?

These problems maintain the same ratio (1.35) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.