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Finding the Fourth Proportional to 326,101.40, 489,152.10 and 279,445.40

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Solution

The fourth proportional to 326,101.40, 489,152.10 and 279,445.40 is: 419,168.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    326,101.40 : 489,152.10 = 279,445.40 : x
  2. Step 2: Convert to fraction form
    326,101.40/489,152.10 = 279,445.40/x
  3. Step 3: Cross multiply
    326,101.40x = 489,152.10 × 279,445.40
  4. Step 4: Simplify right side
    326,101.40x = 136,691,304,245.34
  5. Step 5: Solve for x
    x = 136,691,304,245.34/326,101.40
  6. Step 6: Final answer
    x = 419,168.10

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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.