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Finding the Fourth Proportional to 940.97, 1,411.16 and 393.01

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Solution

The fourth proportional to 940.97, 1,411.16 and 393.01 is: 589.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    940.97 : 1,411.16 = 393.01 : x
  2. Step 2: Convert to fraction form
    940.97/1,411.16 = 393.01/x
  3. Step 3: Cross multiply
    940.97x = 1,411.16 × 393.01
  4. Step 4: Simplify right side
    940.97x = 554,599.99
  5. Step 5: Solve for x
    x = 554,599.99/940.97
  6. Step 6: Final answer
    x = 589.39

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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.