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Finding the Fourth Proportional to 666,490.37, 1,000,141.54 and 239,990.54

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Solution

The fourth proportional to 666,490.37, 1,000,141.54 and 239,990.54 is: 360,131.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    666,490.37 : 1,000,141.54 = 239,990.54 : x
  2. Step 2: Convert to fraction form
    666,490.37/1,000,141.54 = 239,990.54/x
  3. Step 3: Cross multiply
    666,490.37x = 1,000,141.54 × 239,990.54
  4. Step 4: Simplify right side
    666,490.37x = 240,024,502,660.35
  5. Step 5: Solve for x
    x = 240,024,502,660.35/666,490.37
  6. Step 6: Final answer
    x = 360,131.99

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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.