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Finding the Fourth Proportional to 661,754.30, 992,147.58 and 212,219.30

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Solution

The fourth proportional to 661,754.30, 992,147.58 and 212,219.30 is: 318,173.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    661,754.30 : 992,147.58 = 212,219.30 : x
  2. Step 2: Convert to fraction form
    661,754.30/992,147.58 = 212,219.30/x
  3. Step 3: Cross multiply
    661,754.30x = 992,147.58 × 212,219.30
  4. Step 4: Simplify right side
    661,754.30x = 210,552,864,924.29
  5. Step 5: Solve for x
    x = 210,552,864,924.29/661,754.30
  6. Step 6: Final answer
    x = 318,173.78

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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.