Home / 427,290.82-640,887.27-111,778.18

Finding the Fourth Proportional to 427,290.82, 640,887.27 and 111,778.18

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Solution

The fourth proportional to 427,290.82, 640,887.27 and 111,778.18 is: 167,654.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    427,290.82 : 640,887.27 = 111,778.18 : x
  2. Step 2: Convert to fraction form
    427,290.82/640,887.27 = 111,778.18/x
  3. Step 3: Cross multiply
    427,290.82x = 640,887.27 × 111,778.18
  4. Step 4: Simplify right side
    427,290.82x = 71,637,212,625.77
  5. Step 5: Solve for x
    x = 71,637,212,625.77/427,290.82
  6. Step 6: Final answer
    x = 167,654.46

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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.