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Finding the Fourth Proportional to 286,640.70, 429,961.05 and 220,415.10

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Solution

The fourth proportional to 286,640.70, 429,961.05 and 220,415.10 is: 330,622.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    286,640.70 : 429,961.05 = 220,415.10 : x
  2. Step 2: Convert to fraction form
    286,640.70/429,961.05 = 220,415.10/x
  3. Step 3: Cross multiply
    286,640.70x = 429,961.05 × 220,415.10
  4. Step 4: Simplify right side
    286,640.70x = 94,769,907,831.86
  5. Step 5: Solve for x
    x = 94,769,907,831.86/286,640.70
  6. Step 6: Final answer
    x = 330,622.65

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Similar ratio
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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.