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Finding the Fourth Proportional to 941.91, 1,404.75 and 911.54

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Solution

The fourth proportional to 941.91, 1,404.75 and 911.54 is: 1,359.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    941.91 : 1,404.75 = 911.54 : x
  2. Step 2: Convert to fraction form
    941.91/1,404.75 = 911.54/x
  3. Step 3: Cross multiply
    941.91x = 1,404.75 × 911.54
  4. Step 4: Simplify right side
    941.91x = 1,280,478.79
  5. Step 5: Solve for x
    x = 1,280,478.79/941.91
  6. Step 6: Final answer
    x = 1,359.45

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.