Home / 491,433.05-678,386.85-330,381.50

Finding the Fourth Proportional to 491,433.05, 678,386.85 and 330,381.50

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Solution

The fourth proportional to 491,433.05, 678,386.85 and 330,381.50 is: 456,067.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    491,433.05 : 678,386.85 = 330,381.50 : x
  2. Step 2: Convert to fraction form
    491,433.05/678,386.85 = 330,381.50/x
  3. Step 3: Cross multiply
    491,433.05x = 678,386.85 × 330,381.50
  4. Step 4: Simplify right side
    491,433.05x = 224,126,465,083.28
  5. Step 5: Solve for x
    x = 224,126,465,083.28/491,433.05
  6. Step 6: Final answer
    x = 456,067.14

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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.