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Finding the Fourth Proportional to 481,331.76, 664,238.52 and 287,864.88

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Solution

The fourth proportional to 481,331.76, 664,238.52 and 287,864.88 is: 397,253.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    481,331.76 : 664,238.52 = 287,864.88 : x
  2. Step 2: Convert to fraction form
    481,331.76/664,238.52 = 287,864.88/x
  3. Step 3: Cross multiply
    481,331.76x = 664,238.52 × 287,864.88
  4. Step 4: Simplify right side
    481,331.76x = 191,210,941,851.18
  5. Step 5: Solve for x
    x = 191,210,941,851.18/481,331.76
  6. Step 6: Final answer
    x = 397,253.95

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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.