Home / 687,138.51-948,256.87-381,234.96

Finding the Fourth Proportional to 687,138.51, 948,256.87 and 381,234.96

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Solution

The fourth proportional to 687,138.51, 948,256.87 and 381,234.96 is: 526,107.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    687,138.51 : 948,256.87 = 381,234.96 : x
  2. Step 2: Convert to fraction form
    687,138.51/948,256.87 = 381,234.96/x
  3. Step 3: Cross multiply
    687,138.51x = 948,256.87 × 381,234.96
  4. Step 4: Simplify right side
    687,138.51x = 361,508,669,904.18
  5. Step 5: Solve for x
    x = 361,508,669,904.18/687,138.51
  6. Step 6: Final answer
    x = 526,107.42

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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.