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Finding the Fourth Proportional to 644,196.40, 967,072.20 and 639,530.80

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Solution

The fourth proportional to 644,196.40, 967,072.20 and 639,530.80 is: 960,068.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    644,196.40 : 967,072.20 = 639,530.80 : x
  2. Step 2: Convert to fraction form
    644,196.40/967,072.20 = 639,530.80/x
  3. Step 3: Cross multiply
    644,196.40x = 967,072.20 × 639,530.80
  4. Step 4: Simplify right side
    644,196.40x = 618,472,457,723.76
  5. Step 5: Solve for x
    x = 618,472,457,723.76/644,196.40
  6. Step 6: Final answer
    x = 960,068.17

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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.