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Finding the Fourth Proportional to 547,279.70, 820,919.55 and 147,982.10

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Solution

The fourth proportional to 547,279.70, 820,919.55 and 147,982.10 is: 221,973.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    547,279.70 : 820,919.55 = 147,982.10 : x
  2. Step 2: Convert to fraction form
    547,279.70/820,919.55 = 147,982.10/x
  3. Step 3: Cross multiply
    547,279.70x = 820,919.55 × 147,982.10
  4. Step 4: Simplify right side
    547,279.70x = 121,481,398,940.06
  5. Step 5: Solve for x
    x = 121,481,398,940.06/547,279.70
  6. Step 6: Final answer
    x = 221,973.15

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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.