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Finding the Fourth Proportional to 661,475.63, 992,120.04 and 212,138.12

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Solution

The fourth proportional to 661,475.63, 992,120.04 and 212,138.12 is: 318,177.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    661,475.63 : 992,120.04 = 212,138.12 : x
  2. Step 2: Convert to fraction form
    661,475.63/992,120.04 = 212,138.12/x
  3. Step 3: Cross multiply
    661,475.63x = 992,120.04 × 212,138.12
  4. Step 4: Simplify right side
    661,475.63x = 210,466,482,580.23
  5. Step 5: Solve for x
    x = 210,466,482,580.23/661,475.63
  6. Step 6: Final answer
    x = 318,177.23

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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.