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Finding the Fourth Proportional to 388,393.32, 582,621.60 and 107,910.60

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Solution

The fourth proportional to 388,393.32, 582,621.60 and 107,910.60 is: 161,874.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,393.32 : 582,621.60 = 107,910.60 : x
  2. Step 2: Convert to fraction form
    388,393.32/582,621.60 = 107,910.60/x
  3. Step 3: Cross multiply
    388,393.32x = 582,621.60 × 107,910.60
  4. Step 4: Simplify right side
    388,393.32x = 62,871,046,428.96
  5. Step 5: Solve for x
    x = 62,871,046,428.96/388,393.32
  6. Step 6: Final answer
    x = 161,874.69

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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.