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Finding the Fourth Proportional to 377,378.31, 520,856.43 and 216,341.40

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Solution

The fourth proportional to 377,378.31, 520,856.43 and 216,341.40 is: 298,593.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    377,378.31 : 520,856.43 = 216,341.40 : x
  2. Step 2: Convert to fraction form
    377,378.31/520,856.43 = 216,341.40/x
  3. Step 3: Cross multiply
    377,378.31x = 520,856.43 × 216,341.40
  4. Step 4: Simplify right side
    377,378.31x = 112,682,809,265.20
  5. Step 5: Solve for x
    x = 112,682,809,265.20/377,378.31
  6. Step 6: Final answer
    x = 298,593.76

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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.