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Finding the Fourth Proportional to 639,960.66, 960,465.69 and 324,507.78

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Solution

The fourth proportional to 639,960.66, 960,465.69 and 324,507.78 is: 487,027.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,960.66 : 960,465.69 = 324,507.78 : x
  2. Step 2: Convert to fraction form
    639,960.66/960,465.69 = 324,507.78/x
  3. Step 3: Cross multiply
    639,960.66x = 960,465.69 × 324,507.78
  4. Step 4: Simplify right side
    639,960.66x = 311,678,588,828.07
  5. Step 5: Solve for x
    x = 311,678,588,828.07/639,960.66
  6. Step 6: Final answer
    x = 487,027.73

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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.