Home / 687,164.78-948,332.25-396,788.60

Finding the Fourth Proportional to 687,164.78, 948,332.25 and 396,788.60

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Solution

The fourth proportional to 687,164.78, 948,332.25 and 396,788.60 is: 547,594.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    687,164.78 : 948,332.25 = 396,788.60 : x
  2. Step 2: Convert to fraction form
    687,164.78/948,332.25 = 396,788.60/x
  3. Step 3: Cross multiply
    687,164.78x = 948,332.25 × 396,788.60
  4. Step 4: Simplify right side
    687,164.78x = 376,287,428,183.18
  5. Step 5: Solve for x
    x = 376,287,428,183.18/687,164.78
  6. Step 6: Final answer
    x = 547,594.17

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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.