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Finding the Fourth Proportional to 553,249.85, 763,508.26 and 308,234.40

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Solution

The fourth proportional to 553,249.85, 763,508.26 and 308,234.40 is: 425,376.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    553,249.85 : 763,508.26 = 308,234.40 : x
  2. Step 2: Convert to fraction form
    553,249.85/763,508.26 = 308,234.40/x
  3. Step 3: Cross multiply
    553,249.85x = 763,508.26 × 308,234.40
  4. Step 4: Simplify right side
    553,249.85x = 235,339,507,938.28
  5. Step 5: Solve for x
    x = 235,339,507,938.28/553,249.85
  6. Step 6: Final answer
    x = 425,376.55

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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.