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Finding the Fourth Proportional to 444,115, 666,178.17 and 128,572.21

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Solution

The fourth proportional to 444,115, 666,178.17 and 128,572.21 is: 192,859.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    444,115 : 666,178.17 = 128,572.21 : x
  2. Step 2: Convert to fraction form
    444,115/666,178.17 = 128,572.21/x
  3. Step 3: Cross multiply
    444,115x = 666,178.17 × 128,572.21
  4. Step 4: Simplify right side
    444,115x = 85,651,999,570.66
  5. Step 5: Solve for x
    x = 85,651,999,570.66/444,115
  6. Step 6: Final answer
    x = 192,859.96

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1.5x scale

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.