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Finding the Fourth Proportional to 647,420.70, 971,410.91 and 347,551.10

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Solution

The fourth proportional to 647,420.70, 971,410.91 and 347,551.10 is: 521,476.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    647,420.70 : 971,410.91 = 347,551.10 : x
  2. Step 2: Convert to fraction form
    647,420.70/971,410.91 = 347,551.10/x
  3. Step 3: Cross multiply
    647,420.70x = 971,410.91 × 347,551.10
  4. Step 4: Simplify right side
    647,420.70x = 337,614,923,727.69
  5. Step 5: Solve for x
    x = 337,614,923,727.69/647,420.70
  6. Step 6: Final answer
    x = 521,476.88

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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.