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Finding the Fourth Proportional to 377,280.92, 520,721.63 and 216,243.90

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Solution

The fourth proportional to 377,280.92, 520,721.63 and 216,243.90 is: 298,458.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    377,280.92 : 520,721.63 = 216,243.90 : x
  2. Step 2: Convert to fraction form
    377,280.92/520,721.63 = 216,243.90/x
  3. Step 3: Cross multiply
    377,280.92x = 520,721.63 × 216,243.90
  4. Step 4: Simplify right side
    377,280.92x = 112,602,875,004.34
  5. Step 5: Solve for x
    x = 112,602,875,004.34/377,280.92
  6. Step 6: Final answer
    x = 298,458.97

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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.