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Finding the Fourth Proportional to 388,358.88, 582,537.36 and 122,142.72

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Solution

The fourth proportional to 388,358.88, 582,537.36 and 122,142.72 is: 183,213.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,358.88 : 582,537.36 = 122,142.72 : x
  2. Step 2: Convert to fraction form
    388,358.88/582,537.36 = 122,142.72/x
  3. Step 3: Cross multiply
    388,358.88x = 582,537.36 × 122,142.72
  4. Step 4: Simplify right side
    388,358.88x = 71,152,697,652.02
  5. Step 5: Solve for x
    x = 71,152,697,652.02/388,358.88
  6. Step 6: Final answer
    x = 183,213.78

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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.