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Finding the Fourth Proportional to 940.18, 1,410.38 and 550.78

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Solution

The fourth proportional to 940.18, 1,410.38 and 550.78 is: 826.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    940.18 : 1,410.38 = 550.78 : x
  2. Step 2: Convert to fraction form
    940.18/1,410.38 = 550.78/x
  3. Step 3: Cross multiply
    940.18x = 1,410.38 × 550.78
  4. Step 4: Simplify right side
    940.18x = 776,809.10
  5. Step 5: Solve for x
    x = 776,809.10/940.18
  6. Step 6: Final answer
    x = 826.23

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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.