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Finding the Fourth Proportional to 551,076.52, 760,485.30 and 309,359.56

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Solution

The fourth proportional to 551,076.52, 760,485.30 and 309,359.56 is: 426,916.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    551,076.52 : 760,485.30 = 309,359.56 : x
  2. Step 2: Convert to fraction form
    551,076.52/760,485.30 = 309,359.56/x
  3. Step 3: Cross multiply
    551,076.52x = 760,485.30 × 309,359.56
  4. Step 4: Simplify right side
    551,076.52x = 235,263,397,794.47
  5. Step 5: Solve for x
    x = 235,263,397,794.47/551,076.52
  6. Step 6: Final answer
    x = 426,916.03

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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.