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Finding the Fourth Proportional to 910.63, 1,365.64 and 355.22

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Solution

The fourth proportional to 910.63, 1,365.64 and 355.22 is: 532.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    910.63 : 1,365.64 = 355.22 : x
  2. Step 2: Convert to fraction form
    910.63/1,365.64 = 355.22/x
  3. Step 3: Cross multiply
    910.63x = 1,365.64 × 355.22
  4. Step 4: Simplify right side
    910.63x = 485,102.64
  5. Step 5: Solve for x
    x = 485,102.64/910.63
  6. Step 6: Final answer
    x = 532.71

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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.