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Finding the Fourth Proportional to 889,889.12, 1,334,822.56 and 215,976

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Solution

The fourth proportional to 889,889.12, 1,334,822.56 and 215,976 is: 323,961.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    889,889.12 : 1,334,822.56 = 215,976 : x
  2. Step 2: Convert to fraction form
    889,889.12/1,334,822.56 = 215,976/x
  3. Step 3: Cross multiply
    889,889.12x = 1,334,822.56 × 215,976
  4. Step 4: Simplify right side
    889,889.12x = 288,289,637,218.56
  5. Step 5: Solve for x
    x = 288,289,637,218.56/889,889.12
  6. Step 6: Final answer
    x = 323,961.30

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.