Home / 687,628.20-1,031,879.70-403,318.20

Finding the Fourth Proportional to 687,628.20, 1,031,879.70 and 403,318.20

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Solution

The fourth proportional to 687,628.20, 1,031,879.70 and 403,318.20 is: 605,233.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    687,628.20 : 1,031,879.70 = 403,318.20 : x
  2. Step 2: Convert to fraction form
    687,628.20/1,031,879.70 = 403,318.20/x
  3. Step 3: Cross multiply
    687,628.20x = 1,031,879.70 × 403,318.20
  4. Step 4: Simplify right side
    687,628.20x = 416,175,863,220.54
  5. Step 5: Solve for x
    x = 416,175,863,220.54/687,628.20
  6. Step 6: Final answer
    x = 605,233.85

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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.