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Finding the Fourth Proportional to 377,078.98, 520,355.61 and 207,311.78

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Solution

The fourth proportional to 377,078.98, 520,355.61 and 207,311.78 is: 286,082.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    377,078.98 : 520,355.61 = 207,311.78 : x
  2. Step 2: Convert to fraction form
    377,078.98/520,355.61 = 207,311.78/x
  3. Step 3: Cross multiply
    377,078.98x = 520,355.61 × 207,311.78
  4. Step 4: Simplify right side
    377,078.98x = 107,875,847,742.09
  5. Step 5: Solve for x
    x = 107,875,847,742.09/377,078.98
  6. Step 6: Final answer
    x = 286,082.90

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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.