Home / 821,634.35-1,233,466.38-389,764.71

Finding the Fourth Proportional to 821,634.35, 1,233,466.38 and 389,764.71

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Solution

The fourth proportional to 821,634.35, 1,233,466.38 and 389,764.71 is: 585,128.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    821,634.35 : 1,233,466.38 = 389,764.71 : x
  2. Step 2: Convert to fraction form
    821,634.35/1,233,466.38 = 389,764.71/x
  3. Step 3: Cross multiply
    821,634.35x = 1,233,466.38 × 389,764.71
  4. Step 4: Simplify right side
    821,634.35x = 480,761,665,895.45
  5. Step 5: Solve for x
    x = 480,761,665,895.45/821,634.35
  6. Step 6: Final answer
    x = 585,128.49

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1.5x scale

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.