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Finding the Fourth Proportional to 516,920.47, 775,278.49 and 491,287.11

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Solution

The fourth proportional to 516,920.47, 775,278.49 and 491,287.11 is: 736,833.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    516,920.47 : 775,278.49 = 491,287.11 : x
  2. Step 2: Convert to fraction form
    516,920.47/775,278.49 = 491,287.11/x
  3. Step 3: Cross multiply
    516,920.47x = 775,278.49 × 491,287.11
  4. Step 4: Simplify right side
    516,920.47x = 380,884,322,464.44
  5. Step 5: Solve for x
    x = 380,884,322,464.44/516,920.47
  6. Step 6: Final answer
    x = 736,833.51

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Double scale
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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.