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Finding the Fourth Proportional to 552,395.98, 762,218.61 and 310,631.86

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Solution

The fourth proportional to 552,395.98, 762,218.61 and 310,631.86 is: 428,622.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    552,395.98 : 762,218.61 = 310,631.86 : x
  2. Step 2: Convert to fraction form
    552,395.98/762,218.61 = 310,631.86/x
  3. Step 3: Cross multiply
    552,395.98x = 762,218.61 × 310,631.86
  4. Step 4: Simplify right side
    552,395.98x = 236,769,380,739.82
  5. Step 5: Solve for x
    x = 236,769,380,739.82/552,395.98
  6. Step 6: Final answer
    x = 428,622.57

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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.