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Finding the Fourth Proportional to 386,551.22, 579,881.49 and 120,338.60

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Solution

The fourth proportional to 386,551.22, 579,881.49 and 120,338.60 is: 180,524.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,551.22 : 579,881.49 = 120,338.60 : x
  2. Step 2: Convert to fraction form
    386,551.22/579,881.49 = 120,338.60/x
  3. Step 3: Cross multiply
    386,551.22x = 579,881.49 × 120,338.60
  4. Step 4: Simplify right side
    386,551.22x = 69,782,126,672.51
  5. Step 5: Solve for x
    x = 69,782,126,672.51/386,551.22
  6. Step 6: Final answer
    x = 180,524.92

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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.