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Finding the Fourth Proportional to 377,511.30, 521,040.20 and 216,475.20

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Solution

The fourth proportional to 377,511.30, 521,040.20 and 216,475.20 is: 298,778.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    377,511.30 : 521,040.20 = 216,475.20 : x
  2. Step 2: Convert to fraction form
    377,511.30/521,040.20 = 216,475.20/x
  3. Step 3: Cross multiply
    377,511.30x = 521,040.20 × 216,475.20
  4. Step 4: Simplify right side
    377,511.30x = 112,792,280,420.66
  5. Step 5: Solve for x
    x = 112,792,280,420.66/377,511.30
  6. Step 6: Final answer
    x = 298,778.55

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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.