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Finding the Fourth Proportional to 444,012.98, 666,128.87 and 128,501.78

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Solution

The fourth proportional to 444,012.98, 666,128.87 and 128,501.78 is: 192,784.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    444,012.98 : 666,128.87 = 128,501.78 : x
  2. Step 2: Convert to fraction form
    444,012.98/666,128.87 = 128,501.78/x
  3. Step 3: Cross multiply
    444,012.98x = 666,128.87 × 128,501.78
  4. Step 4: Simplify right side
    444,012.98x = 85,598,741,531.24
  5. Step 5: Solve for x
    x = 85,598,741,531.24/444,012.98
  6. Step 6: Final answer
    x = 192,784.32

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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.