Home / 644,380.44-889,220.25-357,918.78

Finding the Fourth Proportional to 644,380.44, 889,220.25 and 357,918.78

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Solution

The fourth proportional to 644,380.44, 889,220.25 and 357,918.78 is: 493,914.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    644,380.44 : 889,220.25 = 357,918.78 : x
  2. Step 2: Convert to fraction form
    644,380.44/889,220.25 = 357,918.78/x
  3. Step 3: Cross multiply
    644,380.44x = 889,220.25 × 357,918.78
  4. Step 4: Simplify right side
    644,380.44x = 318,268,627,031.30
  5. Step 5: Solve for x
    x = 318,268,627,031.30/644,380.44
  6. Step 6: Final answer
    x = 493,914.17

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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.