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Finding the Fourth Proportional to 5,311.42, 7,964.40 and 2,387.23

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Solution

The fourth proportional to 5,311.42, 7,964.40 and 2,387.23 is: 3,579.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,311.42 : 7,964.40 = 2,387.23 : x
  2. Step 2: Convert to fraction form
    5,311.42/7,964.40 = 2,387.23/x
  3. Step 3: Cross multiply
    5,311.42x = 7,964.40 × 2,387.23
  4. Step 4: Simplify right side
    5,311.42x = 19,012,854.61
  5. Step 5: Solve for x
    x = 19,012,854.61/5,311.42
  6. Step 6: Final answer
    x = 3,579.62

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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.