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Finding the Fourth Proportional to 661,656.60, 991,998.90 and 262,099.80

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Solution

The fourth proportional to 661,656.60, 991,998.90 and 262,099.80 is: 392,957.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    661,656.60 : 991,998.90 = 262,099.80 : x
  2. Step 2: Convert to fraction form
    661,656.60/991,998.90 = 262,099.80/x
  3. Step 3: Cross multiply
    661,656.60x = 991,998.90 × 262,099.80
  4. Step 4: Simplify right side
    661,656.60x = 260,002,713,290.22
  5. Step 5: Solve for x
    x = 260,002,713,290.22/661,656.60
  6. Step 6: Final answer
    x = 392,957.18

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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.