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Finding the Fourth Proportional to 628,891.78, 867,891.78 and 353,298

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Solution

The fourth proportional to 628,891.78, 867,891.78 and 353,298 is: 487,563.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    628,891.78 : 867,891.78 = 353,298 : x
  2. Step 2: Convert to fraction form
    628,891.78/867,891.78 = 353,298/x
  3. Step 3: Cross multiply
    628,891.78x = 867,891.78 × 353,298
  4. Step 4: Simplify right side
    628,891.78x = 306,624,430,090.44
  5. Step 5: Solve for x
    x = 306,624,430,090.44/628,891.78
  6. Step 6: Final answer
    x = 487,563.11

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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.