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Finding the Fourth Proportional to 661,654.60, 991,995.90 and 262,097.80

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Solution

The fourth proportional to 661,654.60, 991,995.90 and 262,097.80 is: 392,954.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    661,654.60 : 991,995.90 = 262,097.80 : x
  2. Step 2: Convert to fraction form
    661,654.60/991,995.90 = 262,097.80/x
  3. Step 3: Cross multiply
    661,654.60x = 991,995.90 × 262,097.80
  4. Step 4: Simplify right side
    661,654.60x = 259,999,942,999.02
  5. Step 5: Solve for x
    x = 259,999,942,999.02/661,654.60
  6. Step 6: Final answer
    x = 392,954.18

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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.