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Finding the Fourth Proportional to 220,221.30, 330,331.95 and 218,838.90

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Solution

The fourth proportional to 220,221.30, 330,331.95 and 218,838.90 is: 328,258.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    220,221.30 : 330,331.95 = 218,838.90 : x
  2. Step 2: Convert to fraction form
    220,221.30/330,331.95 = 218,838.90/x
  3. Step 3: Cross multiply
    220,221.30x = 330,331.95 × 218,838.90
  4. Step 4: Simplify right side
    220,221.30x = 72,289,480,572.86
  5. Step 5: Solve for x
    x = 72,289,480,572.86/220,221.30
  6. Step 6: Final answer
    x = 328,258.35

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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.