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Finding the Fourth Proportional to 681,756.32, 940,781.34 and 375,816.80

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Solution

The fourth proportional to 681,756.32, 940,781.34 and 375,816.80 is: 518,603.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    681,756.32 : 940,781.34 = 375,816.80 : x
  2. Step 2: Convert to fraction form
    681,756.32/940,781.34 = 375,816.80/x
  3. Step 3: Cross multiply
    681,756.32x = 940,781.34 × 375,816.80
  4. Step 4: Simplify right side
    681,756.32x = 353,561,432,698.51
  5. Step 5: Solve for x
    x = 353,561,432,698.51/681,756.32
  6. Step 6: Final answer
    x = 518,603.82

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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.