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Finding the Fourth Proportional to 377,513.87, 520,981.47 and 216,399.40

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Solution

The fourth proportional to 377,513.87, 520,981.47 and 216,399.40 is: 298,638.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    377,513.87 : 520,981.47 = 216,399.40 : x
  2. Step 2: Convert to fraction form
    377,513.87/520,981.47 = 216,399.40/x
  3. Step 3: Cross multiply
    377,513.87x = 520,981.47 × 216,399.40
  4. Step 4: Simplify right side
    377,513.87x = 112,740,076,216.66
  5. Step 5: Solve for x
    x = 112,740,076,216.66/377,513.87
  6. Step 6: Final answer
    x = 298,638.24

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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.