Home / 386,361.28-579,539.04-120,121.30

Finding the Fourth Proportional to 386,361.28, 579,539.04 and 120,121.30

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Solution

The fourth proportional to 386,361.28, 579,539.04 and 120,121.30 is: 180,181.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,361.28 : 579,539.04 = 120,121.30 : x
  2. Step 2: Convert to fraction form
    386,361.28/579,539.04 = 120,121.30/x
  3. Step 3: Cross multiply
    386,361.28x = 579,539.04 × 120,121.30
  4. Step 4: Simplify right side
    386,361.28x = 69,614,982,885.55
  5. Step 5: Solve for x
    x = 69,614,982,885.55/386,361.28
  6. Step 6: Final answer
    x = 180,181.05

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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.