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Finding the Fourth Proportional to 940.02, 1,411.65 and 454.02

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Solution

The fourth proportional to 940.02, 1,411.65 and 454.02 is: 681.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    940.02 : 1,411.65 = 454.02 : x
  2. Step 2: Convert to fraction form
    940.02/1,411.65 = 454.02/x
  3. Step 3: Cross multiply
    940.02x = 1,411.65 × 454.02
  4. Step 4: Simplify right side
    940.02x = 640,917.33
  5. Step 5: Solve for x
    x = 640,917.33/940.02
  6. Step 6: Final answer
    x = 681.81

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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.