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Finding the Fourth Proportional to 547,554.40, 821,331.60 and 388,122.10

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Solution

The fourth proportional to 547,554.40, 821,331.60 and 388,122.10 is: 582,183.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    547,554.40 : 821,331.60 = 388,122.10 : x
  2. Step 2: Convert to fraction form
    547,554.40/821,331.60 = 388,122.10/x
  3. Step 3: Cross multiply
    547,554.40x = 821,331.60 × 388,122.10
  4. Step 4: Simplify right side
    547,554.40x = 318,776,945,388.36
  5. Step 5: Solve for x
    x = 318,776,945,388.36/547,554.40
  6. Step 6: Final answer
    x = 582,183.15

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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.