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Finding the Fourth Proportional to 377,285.70, 520,631.06 and 216,103.80

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Solution

The fourth proportional to 377,285.70, 520,631.06 and 216,103.80 is: 298,209.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    377,285.70 : 520,631.06 = 216,103.80 : x
  2. Step 2: Convert to fraction form
    377,285.70/520,631.06 = 216,103.80/x
  3. Step 3: Cross multiply
    377,285.70x = 520,631.06 × 216,103.80
  4. Step 4: Simplify right side
    377,285.70x = 112,510,350,464.03
  5. Step 5: Solve for x
    x = 112,510,350,464.03/377,285.70
  6. Step 6: Final answer
    x = 298,209.95

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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.