Home / 687,319.31-948,505.93-381,396.89

Finding the Fourth Proportional to 687,319.31, 948,505.93 and 381,396.89

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Solution

The fourth proportional to 687,319.31, 948,505.93 and 381,396.89 is: 526,330.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    687,319.31 : 948,505.93 = 381,396.89 : x
  2. Step 2: Convert to fraction form
    687,319.31/948,505.93 = 381,396.89/x
  3. Step 3: Cross multiply
    687,319.31x = 948,505.93 × 381,396.89
  4. Step 4: Simplify right side
    687,319.31x = 361,757,206,152.54
  5. Step 5: Solve for x
    x = 361,757,206,152.54/687,319.31
  6. Step 6: Final answer
    x = 526,330.63

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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.