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Finding the Fourth Proportional to 661,630.92, 992,427.96 and 212,348.28

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Solution

The fourth proportional to 661,630.92, 992,427.96 and 212,348.28 is: 318,516.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    661,630.92 : 992,427.96 = 212,348.28 : x
  2. Step 2: Convert to fraction form
    661,630.92/992,427.96 = 212,348.28/x
  3. Step 3: Cross multiply
    661,630.92x = 992,427.96 × 212,348.28
  4. Step 4: Simplify right side
    661,630.92x = 210,740,370,329.91
  5. Step 5: Solve for x
    x = 210,740,370,329.91/661,630.92
  6. Step 6: Final answer
    x = 318,516.51

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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.