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Finding the Fourth Proportional to 4,891.90, 7,337.85 and 1,815.10

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Solution

The fourth proportional to 4,891.90, 7,337.85 and 1,815.10 is: 2,722.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,891.90 : 7,337.85 = 1,815.10 : x
  2. Step 2: Convert to fraction form
    4,891.90/7,337.85 = 1,815.10/x
  3. Step 3: Cross multiply
    4,891.90x = 7,337.85 × 1,815.10
  4. Step 4: Simplify right side
    4,891.90x = 13,318,931.54
  5. Step 5: Solve for x
    x = 13,318,931.54/4,891.90
  6. Step 6: Final answer
    x = 2,722.65

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Similar ratio
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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.