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Finding the Fourth Proportional to 217,390.80, 326,086.20 and 164,902.80

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Solution

The fourth proportional to 217,390.80, 326,086.20 and 164,902.80 is: 247,354.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    217,390.80 : 326,086.20 = 164,902.80 : x
  2. Step 2: Convert to fraction form
    217,390.80/326,086.20 = 164,902.80/x
  3. Step 3: Cross multiply
    217,390.80x = 326,086.20 × 164,902.80
  4. Step 4: Simplify right side
    217,390.80x = 53,772,527,421.36
  5. Step 5: Solve for x
    x = 53,772,527,421.36/217,390.80
  6. Step 6: Final answer
    x = 247,354.20

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1.5x scale

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.