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Finding the Fourth Proportional to 665,717.36, 998,160 and 281,268.59

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Solution

The fourth proportional to 665,717.36, 998,160 and 281,268.59 is: 421,727.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    665,717.36 : 998,160 = 281,268.59 : x
  2. Step 2: Convert to fraction form
    665,717.36/998,160 = 281,268.59/x
  3. Step 3: Cross multiply
    665,717.36x = 998,160 × 281,268.59
  4. Step 4: Simplify right side
    665,717.36x = 280,751,058,289.80
  5. Step 5: Solve for x
    x = 280,751,058,289.80/665,717.36
  6. Step 6: Final answer
    x = 421,727.11

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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.