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Finding the Fourth Proportional to 681,398.91, 940,330.52 and 395,085.07

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Solution

The fourth proportional to 681,398.91, 940,330.52 and 395,085.07 is: 545,217.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    681,398.91 : 940,330.52 = 395,085.07 : x
  2. Step 2: Convert to fraction form
    681,398.91/940,330.52 = 395,085.07/x
  3. Step 3: Cross multiply
    681,398.91x = 940,330.52 × 395,085.07
  4. Step 4: Simplify right side
    681,398.91x = 371,510,549,998.89
  5. Step 5: Solve for x
    x = 371,510,549,998.89/681,398.91
  6. Step 6: Final answer
    x = 545,217.41

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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.