Home / 681,066.66-939,789.69-390,663.18

Finding the Fourth Proportional to 681,066.66, 939,789.69 and 390,663.18

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Solution

The fourth proportional to 681,066.66, 939,789.69 and 390,663.18 is: 539,067.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    681,066.66 : 939,789.69 = 390,663.18 : x
  2. Step 2: Convert to fraction form
    681,066.66/939,789.69 = 390,663.18/x
  3. Step 3: Cross multiply
    681,066.66x = 939,789.69 × 390,663.18
  4. Step 4: Simplify right side
    681,066.66x = 367,141,228,826.61
  5. Step 5: Solve for x
    x = 367,141,228,826.61/681,066.66
  6. Step 6: Final answer
    x = 539,067.98

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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.