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Finding the Fourth Proportional to 661,794.75, 992,598.39 and 212,456.45

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Solution

The fourth proportional to 661,794.75, 992,598.39 and 212,456.45 is: 318,654.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    661,794.75 : 992,598.39 = 212,456.45 : x
  2. Step 2: Convert to fraction form
    661,794.75/992,598.39 = 212,456.45/x
  3. Step 3: Cross multiply
    661,794.75x = 992,598.39 × 212,456.45
  4. Step 4: Simplify right side
    661,794.75x = 210,883,925,252.12
  5. Step 5: Solve for x
    x = 210,883,925,252.12/661,794.75
  6. Step 6: Final answer
    x = 318,654.58

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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.