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Finding the Fourth Proportional to 661,344.80, 991,940.40 and 188,103.20

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Solution

The fourth proportional to 661,344.80, 991,940.40 and 188,103.20 is: 282,132.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    661,344.80 : 991,940.40 = 188,103.20 : x
  2. Step 2: Convert to fraction form
    661,344.80/991,940.40 = 188,103.20/x
  3. Step 3: Cross multiply
    661,344.80x = 991,940.40 × 188,103.20
  4. Step 4: Simplify right side
    661,344.80x = 186,587,163,449.28
  5. Step 5: Solve for x
    x = 186,587,163,449.28/661,344.80
  6. Step 6: Final answer
    x = 282,132.96

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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.