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Finding the Fourth Proportional to 399,514.24, 551,310.40 and 220,662.40

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Solution

The fourth proportional to 399,514.24, 551,310.40 and 220,662.40 is: 304,503.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,514.24 : 551,310.40 = 220,662.40 : x
  2. Step 2: Convert to fraction form
    399,514.24/551,310.40 = 220,662.40/x
  3. Step 3: Cross multiply
    399,514.24x = 551,310.40 × 220,662.40
  4. Step 4: Simplify right side
    399,514.24x = 121,653,476,008.96
  5. Step 5: Solve for x
    x = 121,653,476,008.96/399,514.24
  6. Step 6: Final answer
    x = 304,503.48

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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.