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Finding the Fourth Proportional to 469,392.12, 647,591.34 and 308,334.84

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Solution

The fourth proportional to 469,392.12, 647,591.34 and 308,334.84 is: 425,390.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    469,392.12 : 647,591.34 = 308,334.84 : x
  2. Step 2: Convert to fraction form
    469,392.12/647,591.34 = 308,334.84/x
  3. Step 3: Cross multiply
    469,392.12x = 647,591.34 × 308,334.84
  4. Step 4: Simplify right side
    469,392.12x = 199,674,972,204.29
  5. Step 5: Solve for x
    x = 199,674,972,204.29/469,392.12
  6. Step 6: Final answer
    x = 425,390.55

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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.