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Finding the Fourth Proportional to 399,588.75, 551,432.48 and 220,740.75

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Solution

The fourth proportional to 399,588.75, 551,432.48 and 220,740.75 is: 304,622.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,588.75 : 551,432.48 = 220,740.75 : x
  2. Step 2: Convert to fraction form
    399,588.75/551,432.48 = 220,740.75/x
  3. Step 3: Cross multiply
    399,588.75x = 551,432.48 × 220,740.75
  4. Step 4: Simplify right side
    399,588.75x = 121,723,618,105.86
  5. Step 5: Solve for x
    x = 121,723,618,105.86/399,588.75
  6. Step 6: Final answer
    x = 304,622.24

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.