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Finding the Fourth Proportional to 276,810.72, 415,068.45 and 143,359.98

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Solution

The fourth proportional to 276,810.72, 415,068.45 and 143,359.98 is: 214,963.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    276,810.72 : 415,068.45 = 143,359.98 : x
  2. Step 2: Convert to fraction form
    276,810.72/415,068.45 = 143,359.98/x
  3. Step 3: Cross multiply
    276,810.72x = 415,068.45 × 143,359.98
  4. Step 4: Simplify right side
    276,810.72x = 59,504,203,402.92
  5. Step 5: Solve for x
    x = 59,504,203,402.92/276,810.72
  6. Step 6: Final answer
    x = 214,963.51

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.