Home / 639,342.54-882,258.21-397,618.29

Finding the Fourth Proportional to 639,342.54, 882,258.21 and 397,618.29

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Solution

The fourth proportional to 639,342.54, 882,258.21 and 397,618.29 is: 548,691.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,342.54 : 882,258.21 = 397,618.29 : x
  2. Step 2: Convert to fraction form
    639,342.54/882,258.21 = 397,618.29/x
  3. Step 3: Cross multiply
    639,342.54x = 882,258.21 × 397,618.29
  4. Step 4: Simplify right side
    639,342.54x = 350,802,000,798.66
  5. Step 5: Solve for x
    x = 350,802,000,798.66/639,342.54
  6. Step 6: Final answer
    x = 548,691.79

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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.