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Finding the Fourth Proportional to 547,807.40, 821,711.10 and 311,611.40

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Solution

The fourth proportional to 547,807.40, 821,711.10 and 311,611.40 is: 467,417.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    547,807.40 : 821,711.10 = 311,611.40 : x
  2. Step 2: Convert to fraction form
    547,807.40/821,711.10 = 311,611.40/x
  3. Step 3: Cross multiply
    547,807.40x = 821,711.10 × 311,611.40
  4. Step 4: Simplify right side
    547,807.40x = 256,054,546,266.54
  5. Step 5: Solve for x
    x = 256,054,546,266.54/547,807.40
  6. Step 6: Final answer
    x = 467,417.10

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Double scale
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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.