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Finding the Fourth Proportional to 525,621.39, 725,414.31 and 321,809.37

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Solution

The fourth proportional to 525,621.39, 725,414.31 and 321,809.37 is: 444,131.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    525,621.39 : 725,414.31 = 321,809.37 : x
  2. Step 2: Convert to fraction form
    525,621.39/725,414.31 = 321,809.37/x
  3. Step 3: Cross multiply
    525,621.39x = 725,414.31 × 321,809.37
  4. Step 4: Simplify right side
    525,621.39x = 233,445,122,090.09
  5. Step 5: Solve for x
    x = 233,445,122,090.09/525,621.39
  6. Step 6: Final answer
    x = 444,131.70

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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.