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Finding the Fourth Proportional to 911.01, 1,365.71 and 355.59

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Solution

The fourth proportional to 911.01, 1,365.71 and 355.59 is: 533.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    911.01 : 1,365.71 = 355.59 : x
  2. Step 2: Convert to fraction form
    911.01/1,365.71 = 355.59/x
  3. Step 3: Cross multiply
    911.01x = 1,365.71 × 355.59
  4. Step 4: Simplify right side
    911.01x = 485,631.04
  5. Step 5: Solve for x
    x = 485,631.04/911.01
  6. Step 6: Final answer
    x = 533.07

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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.