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Finding the Fourth Proportional to 647,469.20, 971,203.80 and 395,526.80

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Solution

The fourth proportional to 647,469.20, 971,203.80 and 395,526.80 is: 593,290.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    647,469.20 : 971,203.80 = 395,526.80 : x
  2. Step 2: Convert to fraction form
    647,469.20/971,203.80 = 395,526.80/x
  3. Step 3: Cross multiply
    647,469.20x = 971,203.80 × 395,526.80
  4. Step 4: Simplify right side
    647,469.20x = 384,137,131,161.84
  5. Step 5: Solve for x
    x = 384,137,131,161.84/647,469.20
  6. Step 6: Final answer
    x = 593,290.20

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1.5x scale

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.