Home / 718,917.86-992,099.80-396,630.56

Finding the Fourth Proportional to 718,917.86, 992,099.80 and 396,630.56

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Solution

The fourth proportional to 718,917.86, 992,099.80 and 396,630.56 is: 547,346.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    718,917.86 : 992,099.80 = 396,630.56 : x
  2. Step 2: Convert to fraction form
    718,917.86/992,099.80 = 396,630.56/x
  3. Step 3: Cross multiply
    718,917.86x = 992,099.80 × 396,630.56
  4. Step 4: Simplify right side
    718,917.86x = 393,497,099,249.89
  5. Step 5: Solve for x
    x = 393,497,099,249.89/718,917.86
  6. Step 6: Final answer
    x = 547,346.40

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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.