Home / 811,712.12-1,120,151.57-449,129.39

Finding the Fourth Proportional to 811,712.12, 1,120,151.57 and 449,129.39

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Solution

The fourth proportional to 811,712.12, 1,120,151.57 and 449,129.39 is: 619,792.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    811,712.12 : 1,120,151.57 = 449,129.39 : x
  2. Step 2: Convert to fraction form
    811,712.12/1,120,151.57 = 449,129.39/x
  3. Step 3: Cross multiply
    811,712.12x = 1,120,151.57 × 449,129.39
  4. Step 4: Simplify right side
    811,712.12x = 503,092,983,495.24
  5. Step 5: Solve for x
    x = 503,092,983,495.24/811,712.12
  6. Step 6: Final answer
    x = 619,792.38

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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.