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Finding the Fourth Proportional to 644,344.39, 889,292.28 and 463,654.45

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Solution

The fourth proportional to 644,344.39, 889,292.28 and 463,654.45 is: 639,912.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    644,344.39 : 889,292.28 = 463,654.45 : x
  2. Step 2: Convert to fraction form
    644,344.39/889,292.28 = 463,654.45/x
  3. Step 3: Cross multiply
    644,344.39x = 889,292.28 × 463,654.45
  4. Step 4: Simplify right side
    644,344.39x = 412,324,322,972.65
  5. Step 5: Solve for x
    x = 412,324,322,972.65/644,344.39
  6. Step 6: Final answer
    x = 639,912.96

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Double scale
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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.