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Finding the Fourth Proportional to 661,667.54, 992,407.43 and 212,330.30

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Solution

The fourth proportional to 661,667.54, 992,407.43 and 212,330.30 is: 318,465.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    661,667.54 : 992,407.43 = 212,330.30 : x
  2. Step 2: Convert to fraction form
    661,667.54/992,407.43 = 212,330.30/x
  3. Step 3: Cross multiply
    661,667.54x = 992,407.43 × 212,330.30
  4. Step 4: Simplify right side
    661,667.54x = 210,718,162,902.92
  5. Step 5: Solve for x
    x = 210,718,162,902.92/661,667.54
  6. Step 6: Final answer
    x = 318,465.32

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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.