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Finding the Fourth Proportional to 639,959.66, 960,464.19 and 324,506.78

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Solution

The fourth proportional to 639,959.66, 960,464.19 and 324,506.78 is: 487,026.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,959.66 : 960,464.19 = 324,506.78 : x
  2. Step 2: Convert to fraction form
    639,959.66/960,464.19 = 324,506.78/x
  3. Step 3: Cross multiply
    639,959.66x = 960,464.19 × 324,506.78
  4. Step 4: Simplify right side
    639,959.66x = 311,677,141,602.21
  5. Step 5: Solve for x
    x = 311,677,141,602.21/639,959.66
  6. Step 6: Final answer
    x = 487,026.23

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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.