Home / 491,433.30-678,387.20-330,381.75

Finding the Fourth Proportional to 491,433.30, 678,387.20 and 330,381.75

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Solution

The fourth proportional to 491,433.30, 678,387.20 and 330,381.75 is: 456,067.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    491,433.30 : 678,387.20 = 330,381.75 : x
  2. Step 2: Convert to fraction form
    491,433.30/678,387.20 = 330,381.75/x
  3. Step 3: Cross multiply
    491,433.30x = 678,387.20 × 330,381.75
  4. Step 4: Simplify right side
    491,433.30x = 224,126,748,661.69
  5. Step 5: Solve for x
    x = 224,126,748,661.69/491,433.30
  6. Step 6: Final answer
    x = 456,067.48

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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.