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Finding the Fourth Proportional to 4,884.80, 7,310.40 and 2,938.40

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Solution

The fourth proportional to 4,884.80, 7,310.40 and 2,938.40 is: 4,397.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,884.80 : 7,310.40 = 2,938.40 : x
  2. Step 2: Convert to fraction form
    4,884.80/7,310.40 = 2,938.40/x
  3. Step 3: Cross multiply
    4,884.80x = 7,310.40 × 2,938.40
  4. Step 4: Simplify right side
    4,884.80x = 21,480,879.36
  5. Step 5: Solve for x
    x = 21,480,879.36/4,884.80
  6. Step 6: Final answer
    x = 4,397.49

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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.