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Finding the Fourth Proportional to 647,655.80, 971,556.60 and 198,373.10

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Solution

The fourth proportional to 647,655.80, 971,556.60 and 198,373.10 is: 297,581.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    647,655.80 : 971,556.60 = 198,373.10 : x
  2. Step 2: Convert to fraction form
    647,655.80/971,556.60 = 198,373.10/x
  3. Step 3: Cross multiply
    647,655.80x = 971,556.60 × 198,373.10
  4. Step 4: Simplify right side
    647,655.80x = 192,730,694,567.46
  5. Step 5: Solve for x
    x = 192,730,694,567.46/647,655.80
  6. Step 6: Final answer
    x = 297,581.98

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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.