Home / 640,939.28-960,007.80-324,853.52

Finding the Fourth Proportional to 640,939.28, 960,007.80 and 324,853.52

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Solution

The fourth proportional to 640,939.28, 960,007.80 and 324,853.52 is: 486,570.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,939.28 : 960,007.80 = 324,853.52 : x
  2. Step 2: Convert to fraction form
    640,939.28/960,007.80 = 324,853.52/x
  3. Step 3: Cross multiply
    640,939.28x = 960,007.80 × 324,853.52
  4. Step 4: Simplify right side
    640,939.28x = 311,861,913,057.46
  5. Step 5: Solve for x
    x = 311,861,913,057.46/640,939.28
  6. Step 6: Final answer
    x = 486,570.14

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.