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Finding the Fourth Proportional to 276,807.13, 415,063.05 and 143,356.39

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Solution

The fourth proportional to 276,807.13, 415,063.05 and 143,356.39 is: 214,958.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    276,807.13 : 415,063.05 = 143,356.39 : x
  2. Step 2: Convert to fraction form
    276,807.13/415,063.05 = 143,356.39/x
  3. Step 3: Cross multiply
    276,807.13x = 415,063.05 × 143,356.39
  4. Step 4: Simplify right side
    276,807.13x = 59,501,940,470.39
  5. Step 5: Solve for x
    x = 59,501,940,470.39/276,807.13
  6. Step 6: Final answer
    x = 214,958.12

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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.