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Finding the Fourth Proportional to 647,512.80, 971,342.10 and 198,230.10

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Solution

The fourth proportional to 647,512.80, 971,342.10 and 198,230.10 is: 297,367.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    647,512.80 : 971,342.10 = 198,230.10 : x
  2. Step 2: Convert to fraction form
    647,512.80/971,342.10 = 198,230.10/x
  3. Step 3: Cross multiply
    647,512.80x = 971,342.10 × 198,230.10
  4. Step 4: Simplify right side
    647,512.80x = 192,549,241,617.21
  5. Step 5: Solve for x
    x = 192,549,241,617.21/647,512.80
  6. Step 6: Final answer
    x = 297,367.47

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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.