Home / 686,921.78-948,065.52-381,096.68

Finding the Fourth Proportional to 686,921.78, 948,065.52 and 381,096.68

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Solution

The fourth proportional to 686,921.78, 948,065.52 and 381,096.68 is: 525,976.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    686,921.78 : 948,065.52 = 381,096.68 : x
  2. Step 2: Convert to fraction form
    686,921.78/948,065.52 = 381,096.68/x
  3. Step 3: Cross multiply
    686,921.78x = 948,065.52 × 381,096.68
  4. Step 4: Simplify right side
    686,921.78x = 361,304,622,094.47
  5. Step 5: Solve for x
    x = 361,304,622,094.47/686,921.78
  6. Step 6: Final answer
    x = 525,976.37

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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.