Home / 821,301.60-1,230,233.90-660,508.36

Finding the Fourth Proportional to 821,301.60, 1,230,233.90 and 660,508.36

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Solution

The fourth proportional to 821,301.60, 1,230,233.90 and 660,508.36 is: 989,380.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    821,301.60 : 1,230,233.90 = 660,508.36 : x
  2. Step 2: Convert to fraction form
    821,301.60/1,230,233.90 = 660,508.36/x
  3. Step 3: Cross multiply
    821,301.60x = 1,230,233.90 × 660,508.36
  4. Step 4: Simplify right side
    821,301.60x = 812,579,773,940.66
  5. Step 5: Solve for x
    x = 812,579,773,940.66/821,301.60
  6. Step 6: Final answer
    x = 989,380.49

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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.