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Finding the Fourth Proportional to 547,211.70, 820,817.55 and 147,914.10

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Solution

The fourth proportional to 547,211.70, 820,817.55 and 147,914.10 is: 221,871.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    547,211.70 : 820,817.55 = 147,914.10 : x
  2. Step 2: Convert to fraction form
    547,211.70/820,817.55 = 147,914.10/x
  3. Step 3: Cross multiply
    547,211.70x = 820,817.55 × 147,914.10
  4. Step 4: Simplify right side
    547,211.70x = 121,410,489,172.46
  5. Step 5: Solve for x
    x = 121,410,489,172.46/547,211.70
  6. Step 6: Final answer
    x = 221,871.15

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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.