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Finding the Fourth Proportional to 399,590.88, 551,435.41 and 220,742.88

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Solution

The fourth proportional to 399,590.88, 551,435.41 and 220,742.88 is: 304,625.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,590.88 : 551,435.41 = 220,742.88 : x
  2. Step 2: Convert to fraction form
    399,590.88/551,435.41 = 220,742.88/x
  3. Step 3: Cross multiply
    399,590.88x = 551,435.41 × 220,742.88
  4. Step 4: Simplify right side
    399,590.88x = 121,725,440,537.38
  5. Step 5: Solve for x
    x = 121,725,440,537.38/399,590.88
  6. Step 6: Final answer
    x = 304,625.17

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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.