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Finding the Fourth Proportional to 389,079.43, 583,449.65 and 206,670.32

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Solution

The fourth proportional to 389,079.43, 583,449.65 and 206,670.32 is: 309,915.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,079.43 : 583,449.65 = 206,670.32 : x
  2. Step 2: Convert to fraction form
    389,079.43/583,449.65 = 206,670.32/x
  3. Step 3: Cross multiply
    389,079.43x = 583,449.65 × 206,670.32
  4. Step 4: Simplify right side
    389,079.43x = 120,581,723,377.41
  5. Step 5: Solve for x
    x = 120,581,723,377.41/389,079.43
  6. Step 6: Final answer
    x = 309,915.44

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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.