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Finding the Fourth Proportional to 661,476.01, 992,120.60 and 212,138.50

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Solution

The fourth proportional to 661,476.01, 992,120.60 and 212,138.50 is: 318,177.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    661,476.01 : 992,120.60 = 212,138.50 : x
  2. Step 2: Convert to fraction form
    661,476.01/992,120.60 = 212,138.50/x
  3. Step 3: Cross multiply
    661,476.01x = 992,120.60 × 212,138.50
  4. Step 4: Simplify right side
    661,476.01x = 210,466,973,953.15
  5. Step 5: Solve for x
    x = 210,466,973,953.15/661,476.01
  6. Step 6: Final answer
    x = 318,177.79

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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.