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Finding the Fourth Proportional to 718,850.86, 992,015.22 and 396,560.32

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Solution

The fourth proportional to 718,850.86, 992,015.22 and 396,560.32 is: 547,253.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    718,850.86 : 992,015.22 = 396,560.32 : x
  2. Step 2: Convert to fraction form
    718,850.86/992,015.22 = 396,560.32/x
  3. Step 3: Cross multiply
    718,850.86x = 992,015.22 × 396,560.32
  4. Step 4: Simplify right side
    718,850.86x = 393,393,873,088.07
  5. Step 5: Solve for x
    x = 393,393,873,088.07/718,850.86
  6. Step 6: Final answer
    x = 547,253.81

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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.