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Finding the Fourth Proportional to 647,940.70, 971,911.05 and 579,706.30

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Solution

The fourth proportional to 647,940.70, 971,911.05 and 579,706.30 is: 869,559.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    647,940.70 : 971,911.05 = 579,706.30 : x
  2. Step 2: Convert to fraction form
    647,940.70/971,911.05 = 579,706.30/x
  3. Step 3: Cross multiply
    647,940.70x = 971,911.05 × 579,706.30
  4. Step 4: Simplify right side
    647,940.70x = 563,422,958,724.62
  5. Step 5: Solve for x
    x = 563,422,958,724.62/647,940.70
  6. Step 6: Final answer
    x = 869,559.45

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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.