Home / 687,223.05-948,481.56-381,397.65

Finding the Fourth Proportional to 687,223.05, 948,481.56 and 381,397.65

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Solution

The fourth proportional to 687,223.05, 948,481.56 and 381,397.65 is: 526,391.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    687,223.05 : 948,481.56 = 381,397.65 : x
  2. Step 2: Convert to fraction form
    687,223.05/948,481.56 = 381,397.65/x
  3. Step 3: Cross multiply
    687,223.05x = 948,481.56 × 381,397.65
  4. Step 4: Simplify right side
    687,223.05x = 361,748,638,052.33
  5. Step 5: Solve for x
    x = 361,748,638,052.33/687,223.05
  6. Step 6: Final answer
    x = 526,391.89

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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.