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Finding the Fourth Proportional to 368,000.20, 551,344.20 and 311,575.60

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Solution

The fourth proportional to 368,000.20, 551,344.20 and 311,575.60 is: 466,807.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    368,000.20 : 551,344.20 = 311,575.60 : x
  2. Step 2: Convert to fraction form
    368,000.20/551,344.20 = 311,575.60/x
  3. Step 3: Cross multiply
    368,000.20x = 551,344.20 × 311,575.60
  4. Step 4: Simplify right side
    368,000.20x = 171,785,399,921.52
  5. Step 5: Solve for x
    x = 171,785,399,921.52/368,000.20
  6. Step 6: Final answer
    x = 466,807.90

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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.