Home / 456,975.66-686,680.05-428,245.80

Finding the Fourth Proportional to 456,975.66, 686,680.05 and 428,245.80

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Solution

The fourth proportional to 456,975.66, 686,680.05 and 428,245.80 is: 643,508.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    456,975.66 : 686,680.05 = 428,245.80 : x
  2. Step 2: Convert to fraction form
    456,975.66/686,680.05 = 428,245.80/x
  3. Step 3: Cross multiply
    456,975.66x = 686,680.05 × 428,245.80
  4. Step 4: Simplify right side
    456,975.66x = 294,067,847,356.29
  5. Step 5: Solve for x
    x = 294,067,847,356.29/456,975.66
  6. Step 6: Final answer
    x = 643,508.78

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.