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Finding the Fourth Proportional to 551,326.43, 760,848.90 and 309,651.59

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Solution

The fourth proportional to 551,326.43, 760,848.90 and 309,651.59 is: 427,329.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    551,326.43 : 760,848.90 = 309,651.59 : x
  2. Step 2: Convert to fraction form
    551,326.43/760,848.90 = 309,651.59/x
  3. Step 3: Cross multiply
    551,326.43x = 760,848.90 × 309,651.59
  4. Step 4: Simplify right side
    551,326.43x = 235,598,072,375.68
  5. Step 5: Solve for x
    x = 235,598,072,375.68/551,326.43
  6. Step 6: Final answer
    x = 427,329.54

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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.