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Finding the Fourth Proportional to 326,615,793.90, 489,923,690.85 and 217,776,677.10

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Solution

The fourth proportional to 326,615,793.90, 489,923,690.85 and 217,776,677.10 is: 326,665,015.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    326,615,793.90 : 489,923,690.85 = 217,776,677.10 : x
  2. Step 2: Convert to fraction form
    326,615,793.90/489,923,690.85 = 217,776,677.10/x
  3. Step 3: Cross multiply
    326,615,793.90x = 489,923,690.85 × 217,776,677.10
  4. Step 4: Simplify right side
    326,615,793.90x = 106,693,953,425,880,672
  5. Step 5: Solve for x
    x = 106,693,953,425,880,672/326,615,793.90
  6. Step 6: Final answer
    x = 326,665,015.65

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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.