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Finding the Fourth Proportional to 957.49, 1,436.39 and 409.34

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Solution

The fourth proportional to 957.49, 1,436.39 and 409.34 is: 614.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    957.49 : 1,436.39 = 409.34 : x
  2. Step 2: Convert to fraction form
    957.49/1,436.39 = 409.34/x
  3. Step 3: Cross multiply
    957.49x = 1,436.39 × 409.34
  4. Step 4: Simplify right side
    957.49x = 587,971.88
  5. Step 5: Solve for x
    x = 587,971.88/957.49
  6. Step 6: Final answer
    x = 614.08

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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.