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Finding the Fourth Proportional to 644,757.84, 889,489.79 and 402,620.04

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Solution

The fourth proportional to 644,757.84, 889,489.79 and 402,620.04 is: 555,443.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    644,757.84 : 889,489.79 = 402,620.04 : x
  2. Step 2: Convert to fraction form
    644,757.84/889,489.79 = 402,620.04/x
  3. Step 3: Cross multiply
    644,757.84x = 889,489.79 × 402,620.04
  4. Step 4: Simplify right side
    644,757.84x = 358,126,414,829.39
  5. Step 5: Solve for x
    x = 358,126,414,829.39/644,757.84
  6. Step 6: Final answer
    x = 555,443.29

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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.