Home / 687,305.43-948,486.66-381,383.01

Finding the Fourth Proportional to 687,305.43, 948,486.66 and 381,383.01

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Solution

The fourth proportional to 687,305.43, 948,486.66 and 381,383.01 is: 526,311.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    687,305.43 : 948,486.66 = 381,383.01 : x
  2. Step 2: Convert to fraction form
    687,305.43/948,486.66 = 381,383.01/x
  3. Step 3: Cross multiply
    687,305.43x = 948,486.66 × 381,383.01
  4. Step 4: Simplify right side
    687,305.43x = 361,736,697,335.65
  5. Step 5: Solve for x
    x = 361,736,697,335.65/687,305.43
  6. Step 6: Final answer
    x = 526,311.42

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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.