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Finding the Fourth Proportional to 399,215.88, 551,097.54 and 263,330.28

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Solution

The fourth proportional to 399,215.88, 551,097.54 and 263,330.28 is: 363,514.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,215.88 : 551,097.54 = 263,330.28 : x
  2. Step 2: Convert to fraction form
    399,215.88/551,097.54 = 263,330.28/x
  3. Step 3: Cross multiply
    399,215.88x = 551,097.54 × 263,330.28
  4. Step 4: Simplify right side
    399,215.88x = 145,120,669,515.51
  5. Step 5: Solve for x
    x = 145,120,669,515.51/399,215.88
  6. Step 6: Final answer
    x = 363,514.27

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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.