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Finding the Fourth Proportional to 647,543.70, 971,315.55 and 395,601.30

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Solution

The fourth proportional to 647,543.70, 971,315.55 and 395,601.30 is: 593,401.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    647,543.70 : 971,315.55 = 395,601.30 : x
  2. Step 2: Convert to fraction form
    647,543.70/971,315.55 = 395,601.30/x
  3. Step 3: Cross multiply
    647,543.70x = 971,315.55 × 395,601.30
  4. Step 4: Simplify right side
    647,543.70x = 384,253,694,290.22
  5. Step 5: Solve for x
    x = 384,253,694,290.22/647,543.70
  6. Step 6: Final answer
    x = 593,401.95

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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.