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Finding the Fourth Proportional to 386,240.40, 579,361.68 and 120,039.84

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Solution

The fourth proportional to 386,240.40, 579,361.68 and 120,039.84 is: 180,060.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,240.40 : 579,361.68 = 120,039.84 : x
  2. Step 2: Convert to fraction form
    386,240.40/579,361.68 = 120,039.84/x
  3. Step 3: Cross multiply
    386,240.40x = 579,361.68 × 120,039.84
  4. Step 4: Simplify right side
    386,240.40x = 69,546,483,369.33
  5. Step 5: Solve for x
    x = 69,546,483,369.33/386,240.40
  6. Step 6: Final answer
    x = 180,060.10

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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.