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Finding the Fourth Proportional to 547,548.20, 821,322.30 and 311,618.60

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Solution

The fourth proportional to 547,548.20, 821,322.30 and 311,618.60 is: 467,427.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    547,548.20 : 821,322.30 = 311,618.60 : x
  2. Step 2: Convert to fraction form
    547,548.20/821,322.30 = 311,618.60/x
  3. Step 3: Cross multiply
    547,548.20x = 821,322.30 × 311,618.60
  4. Step 4: Simplify right side
    547,548.20x = 255,939,305,274.78
  5. Step 5: Solve for x
    x = 255,939,305,274.78/547,548.20
  6. Step 6: Final answer
    x = 467,427.90

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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.