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Finding the Fourth Proportional to 3,520.80, 4,858.80 and 1,948.80

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Solution

The fourth proportional to 3,520.80, 4,858.80 and 1,948.80 is: 2,689.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,520.80 : 4,858.80 = 1,948.80 : x
  2. Step 2: Convert to fraction form
    3,520.80/4,858.80 = 1,948.80/x
  3. Step 3: Cross multiply
    3,520.80x = 4,858.80 × 1,948.80
  4. Step 4: Simplify right side
    3,520.80x = 9,468,829.44
  5. Step 5: Solve for x
    x = 9,468,829.44/3,520.80
  6. Step 6: Final answer
    x = 2,689.40

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.