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Finding the Fourth Proportional to 427,161.01, 640,544.28 and 157,221.34

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Solution

The fourth proportional to 427,161.01, 640,544.28 and 157,221.34 is: 235,759.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    427,161.01 : 640,544.28 = 157,221.34 : x
  2. Step 2: Convert to fraction form
    427,161.01/640,544.28 = 157,221.34/x
  3. Step 3: Cross multiply
    427,161.01x = 640,544.28 × 157,221.34
  4. Step 4: Simplify right side
    427,161.01x = 100,707,230,030.94
  5. Step 5: Solve for x
    x = 100,707,230,030.94/427,161.01
  6. Step 6: Final answer
    x = 235,759.42

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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.