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Finding the Fourth Proportional to 376,990, 520,247.28 and 215,847.52

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Solution

The fourth proportional to 376,990, 520,247.28 and 215,847.52 is: 297,870.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    376,990 : 520,247.28 = 215,847.52 : x
  2. Step 2: Convert to fraction form
    376,990/520,247.28 = 215,847.52/x
  3. Step 3: Cross multiply
    376,990x = 520,247.28 × 215,847.52
  4. Step 4: Simplify right side
    376,990x = 112,294,085,174.75
  5. Step 5: Solve for x
    x = 112,294,085,174.75/376,990
  6. Step 6: Final answer
    x = 297,870.20

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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.