Home / 861,489.78-1,188,855.81-479,508.36

Finding the Fourth Proportional to 861,489.78, 1,188,855.81 and 479,508.36

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Solution

The fourth proportional to 861,489.78, 1,188,855.81 and 479,508.36 is: 661,721.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    861,489.78 : 1,188,855.81 = 479,508.36 : x
  2. Step 2: Convert to fraction form
    861,489.78/1,188,855.81 = 479,508.36/x
  3. Step 3: Cross multiply
    861,489.78x = 1,188,855.81 × 479,508.36
  4. Step 4: Simplify right side
    861,489.78x = 570,066,299,729.57
  5. Step 5: Solve for x
    x = 570,066,299,729.57/861,489.78
  6. Step 6: Final answer
    x = 661,721.49

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1.5x scale

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.