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Finding the Fourth Proportional to 275,807.94, 380,631.18 and 207,704.76

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Solution

The fourth proportional to 275,807.94, 380,631.18 and 207,704.76 is: 286,644.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    275,807.94 : 380,631.18 = 207,704.76 : x
  2. Step 2: Convert to fraction form
    275,807.94/380,631.18 = 207,704.76/x
  3. Step 3: Cross multiply
    275,807.94x = 380,631.18 × 207,704.76
  4. Step 4: Simplify right side
    275,807.94x = 79,058,907,890.42
  5. Step 5: Solve for x
    x = 79,058,907,890.42/275,807.94
  6. Step 6: Final answer
    x = 286,644.79

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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.