Home / 681,343.31-940,272.71-390,979.41

Finding the Fourth Proportional to 681,343.31, 940,272.71 and 390,979.41

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Solution

The fourth proportional to 681,343.31, 940,272.71 and 390,979.41 is: 539,562.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    681,343.31 : 940,272.71 = 390,979.41 : x
  2. Step 2: Convert to fraction form
    681,343.31/940,272.71 = 390,979.41/x
  3. Step 3: Cross multiply
    681,343.31x = 940,272.71 × 390,979.41
  4. Step 4: Simplify right side
    681,343.31x = 367,627,267,440.00
  5. Step 5: Solve for x
    x = 367,627,267,440.00/681,343.31
  6. Step 6: Final answer
    x = 539,562.46

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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.