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Finding the Fourth Proportional to 639,963.16, 960,469.44 and 324,510.28

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Solution

The fourth proportional to 639,963.16, 960,469.44 and 324,510.28 is: 487,031.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,963.16 : 960,469.44 = 324,510.28 : x
  2. Step 2: Convert to fraction form
    639,963.16/960,469.44 = 324,510.28/x
  3. Step 3: Cross multiply
    639,963.16x = 960,469.44 × 324,510.28
  4. Step 4: Simplify right side
    639,963.16x = 311,682,206,905.84
  5. Step 5: Solve for x
    x = 311,682,206,905.84/639,963.16
  6. Step 6: Final answer
    x = 487,031.48

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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.