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Finding the Fourth Proportional to 644,343.39, 889,290.90 and 463,653.45

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Solution

The fourth proportional to 644,343.39, 889,290.90 and 463,653.45 is: 639,911.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    644,343.39 : 889,290.90 = 463,653.45 : x
  2. Step 2: Convert to fraction form
    644,343.39/889,290.90 = 463,653.45/x
  3. Step 3: Cross multiply
    644,343.39x = 889,290.90 × 463,653.45
  4. Step 4: Simplify right side
    644,343.39x = 412,322,793,838.61
  5. Step 5: Solve for x
    x = 412,322,793,838.61/644,343.39
  6. Step 6: Final answer
    x = 639,911.58

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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.