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Finding the Fourth Proportional to 718,919.86, 992,102.56 and 396,632.56

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Solution

The fourth proportional to 718,919.86, 992,102.56 and 396,632.56 is: 547,349.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    718,919.86 : 992,102.56 = 396,632.56 : x
  2. Step 2: Convert to fraction form
    718,919.86/992,102.56 = 396,632.56/x
  3. Step 3: Cross multiply
    718,919.86x = 992,102.56 × 396,632.56
  4. Step 4: Simplify right side
    718,919.86x = 393,500,178,155.35
  5. Step 5: Solve for x
    x = 393,500,178,155.35/718,919.86
  6. Step 6: Final answer
    x = 547,349.16

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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.