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Finding the Fourth Proportional to 940.28, 1,411.34 and 508.36

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Solution

The fourth proportional to 940.28, 1,411.34 and 508.36 is: 763.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    940.28 : 1,411.34 = 508.36 : x
  2. Step 2: Convert to fraction form
    940.28/1,411.34 = 508.36/x
  3. Step 3: Cross multiply
    940.28x = 1,411.34 × 508.36
  4. Step 4: Simplify right side
    940.28x = 717,468.80
  5. Step 5: Solve for x
    x = 717,468.80/940.28
  6. Step 6: Final answer
    x = 763.04

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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.