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Finding the Fourth Proportional to 661,317.60, 991,684.80 and 261,825.60

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Solution

The fourth proportional to 661,317.60, 991,684.80 and 261,825.60 is: 392,622.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    661,317.60 : 991,684.80 = 261,825.60 : x
  2. Step 2: Convert to fraction form
    661,317.60/991,684.80 = 261,825.60/x
  3. Step 3: Cross multiply
    661,317.60x = 991,684.80 × 261,825.60
  4. Step 4: Simplify right side
    661,317.60x = 259,648,467,770.88
  5. Step 5: Solve for x
    x = 259,648,467,770.88/661,317.60
  6. Step 6: Final answer
    x = 392,622.95

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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.