Home / 781,786.39-1,079,538.56-491,881.32

Finding the Fourth Proportional to 781,786.39, 1,079,538.56 and 491,881.32

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Solution

The fourth proportional to 781,786.39, 1,079,538.56 and 491,881.32 is: 679,219.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    781,786.39 : 1,079,538.56 = 491,881.32 : x
  2. Step 2: Convert to fraction form
    781,786.39/1,079,538.56 = 491,881.32/x
  3. Step 3: Cross multiply
    781,786.39x = 1,079,538.56 × 491,881.32
  4. Step 4: Simplify right side
    781,786.39x = 531,004,851,883.70
  5. Step 5: Solve for x
    x = 531,004,851,883.70/781,786.39
  6. Step 6: Final answer
    x = 679,219.87

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Double scale
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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.