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Finding the Fourth Proportional to 217,612.60, 326,418.90 and 147,110.20

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Solution

The fourth proportional to 217,612.60, 326,418.90 and 147,110.20 is: 220,665.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    217,612.60 : 326,418.90 = 147,110.20 : x
  2. Step 2: Convert to fraction form
    217,612.60/326,418.90 = 147,110.20/x
  3. Step 3: Cross multiply
    217,612.60x = 326,418.90 × 147,110.20
  4. Step 4: Simplify right side
    217,612.60x = 48,019,549,662.78
  5. Step 5: Solve for x
    x = 48,019,549,662.78/217,612.60
  6. Step 6: Final answer
    x = 220,665.30

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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.