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Finding the Fourth Proportional to 423,469.28, 637,739.16 and 385,677.92

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Solution

The fourth proportional to 423,469.28, 637,739.16 and 385,677.92 is: 580,825.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    423,469.28 : 637,739.16 = 385,677.92 : x
  2. Step 2: Convert to fraction form
    423,469.28/637,739.16 = 385,677.92/x
  3. Step 3: Cross multiply
    423,469.28x = 637,739.16 × 385,677.92
  4. Step 4: Simplify right side
    423,469.28x = 245,961,912,731.35
  5. Step 5: Solve for x
    x = 245,961,912,731.35/423,469.28
  6. Step 6: Final answer
    x = 580,825.87

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.