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Finding the Fourth Proportional to 5,281.94, 7,919.70 and 2,646.38

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Solution

The fourth proportional to 5,281.94, 7,919.70 and 2,646.38 is: 3,967.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,281.94 : 7,919.70 = 2,646.38 : x
  2. Step 2: Convert to fraction form
    5,281.94/7,919.70 = 2,646.38/x
  3. Step 3: Cross multiply
    5,281.94x = 7,919.70 × 2,646.38
  4. Step 4: Simplify right side
    5,281.94x = 20,958,535.69
  5. Step 5: Solve for x
    x = 20,958,535.69/5,281.94
  6. Step 6: Final answer
    x = 3,967.96

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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.