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Finding the Fourth Proportional to 398,991.64, 550,605.63 and 226,909.67

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Solution

The fourth proportional to 398,991.64, 550,605.63 and 226,909.67 is: 313,133.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,991.64 : 550,605.63 = 226,909.67 : x
  2. Step 2: Convert to fraction form
    398,991.64/550,605.63 = 226,909.67/x
  3. Step 3: Cross multiply
    398,991.64x = 550,605.63 × 226,909.67
  4. Step 4: Simplify right side
    398,991.64x = 124,937,739,050.41
  5. Step 5: Solve for x
    x = 124,937,739,050.41/398,991.64
  6. Step 6: Final answer
    x = 313,133.73

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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.