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Finding the Fourth Proportional to 4,999.80, 7,500.12 and 2,078.40

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Solution

The fourth proportional to 4,999.80, 7,500.12 and 2,078.40 is: 3,117.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,999.80 : 7,500.12 = 2,078.40 : x
  2. Step 2: Convert to fraction form
    4,999.80/7,500.12 = 2,078.40/x
  3. Step 3: Cross multiply
    4,999.80x = 7,500.12 × 2,078.40
  4. Step 4: Simplify right side
    4,999.80x = 15,588,249.41
  5. Step 5: Solve for x
    x = 15,588,249.41/4,999.80
  6. Step 6: Final answer
    x = 3,117.77

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1.5x scale

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.