Home / 386,000.90-578,742.15-206,116.10

Finding the Fourth Proportional to 386,000.90, 578,742.15 and 206,116.10

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Solution

The fourth proportional to 386,000.90, 578,742.15 and 206,116.10 is: 309,035.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,000.90 : 578,742.15 = 206,116.10 : x
  2. Step 2: Convert to fraction form
    386,000.90/578,742.15 = 206,116.10/x
  3. Step 3: Cross multiply
    386,000.90x = 578,742.15 × 206,116.10
  4. Step 4: Simplify right side
    386,000.90x = 119,288,074,863.62
  5. Step 5: Solve for x
    x = 119,288,074,863.62/386,000.90
  6. Step 6: Final answer
    x = 309,035.74

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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.