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Finding the Fourth Proportional to 276,670.80, 387,864 and 276,670.80

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Solution

The fourth proportional to 276,670.80, 387,864 and 276,670.80 is: 387,864

Step by Step Solution

  1. Step 1: Write the proportion equation
    276,670.80 : 387,864 = 276,670.80 : x
  2. Step 2: Convert to fraction form
    276,670.80/387,864 = 276,670.80/x
  3. Step 3: Cross multiply
    276,670.80x = 387,864 × 276,670.80
  4. Step 4: Simplify right side
    276,670.80x = 107,310,643,171.20
  5. Step 5: Solve for x
    x = 107,310,643,171.20/276,670.80
  6. Step 6: Final answer
    x = 387,864

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Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.