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Finding the Fourth Proportional to 220,111.40, 330,167.10 and 206,989.40

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Solution

The fourth proportional to 220,111.40, 330,167.10 and 206,989.40 is: 310,484.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    220,111.40 : 330,167.10 = 206,989.40 : x
  2. Step 2: Convert to fraction form
    220,111.40/330,167.10 = 206,989.40/x
  3. Step 3: Cross multiply
    220,111.40x = 330,167.10 × 206,989.40
  4. Step 4: Simplify right side
    220,111.40x = 68,341,089,928.74
  5. Step 5: Solve for x
    x = 68,341,089,928.74/220,111.40
  6. Step 6: Final answer
    x = 310,484.10

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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.