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Finding the Fourth Proportional to 666,321.20, 999,242.40 and 192,908.60

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Solution

The fourth proportional to 666,321.20, 999,242.40 and 192,908.60 is: 289,293.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    666,321.20 : 999,242.40 = 192,908.60 : x
  2. Step 2: Convert to fraction form
    666,321.20/999,242.40 = 192,908.60/x
  3. Step 3: Cross multiply
    666,321.20x = 999,242.40 × 192,908.60
  4. Step 4: Simplify right side
    666,321.20x = 192,762,452,444.64
  5. Step 5: Solve for x
    x = 192,762,452,444.64/666,321.20
  6. Step 6: Final answer
    x = 289,293.59

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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.