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Finding the Fourth Proportional to 547,239.20, 820,858.80 and 147,941.60

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Solution

The fourth proportional to 547,239.20, 820,858.80 and 147,941.60 is: 221,912.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    547,239.20 : 820,858.80 = 147,941.60 : x
  2. Step 2: Convert to fraction form
    547,239.20/820,858.80 = 147,941.60/x
  3. Step 3: Cross multiply
    547,239.20x = 820,858.80 × 147,941.60
  4. Step 4: Simplify right side
    547,239.20x = 121,439,164,246.08
  5. Step 5: Solve for x
    x = 121,439,164,246.08/547,239.20
  6. Step 6: Final answer
    x = 221,912.40

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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.