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Finding the Fourth Proportional to 325,410.28, 487,266.50 and 261,883.40

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Solution

The fourth proportional to 325,410.28, 487,266.50 and 261,883.40 is: 392,141.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    325,410.28 : 487,266.50 = 261,883.40 : x
  2. Step 2: Convert to fraction form
    325,410.28/487,266.50 = 261,883.40/x
  3. Step 3: Cross multiply
    325,410.28x = 487,266.50 × 261,883.40
  4. Step 4: Simplify right side
    325,410.28x = 127,607,005,944.48
  5. Step 5: Solve for x
    x = 127,607,005,944.48/325,410.28
  6. Step 6: Final answer
    x = 392,141.90

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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.