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Finding the Fourth Proportional to 399,316.84, 551,149.14 and 263,375.08

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Solution

The fourth proportional to 399,316.84, 551,149.14 and 263,375.08 is: 363,518.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,316.84 : 551,149.14 = 263,375.08 : x
  2. Step 2: Convert to fraction form
    399,316.84/551,149.14 = 263,375.08/x
  3. Step 3: Cross multiply
    399,316.84x = 551,149.14 × 263,375.08
  4. Step 4: Simplify right side
    399,316.84x = 145,158,948,839.43
  5. Step 5: Solve for x
    x = 145,158,948,839.43/399,316.84
  6. Step 6: Final answer
    x = 363,518.22

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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.