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Finding the Fourth Proportional to 1,201.97, 1,802.95 and 928.46

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Solution

The fourth proportional to 1,201.97, 1,802.95 and 928.46 is: 1,392.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,201.97 : 1,802.95 = 928.46 : x
  2. Step 2: Convert to fraction form
    1,201.97/1,802.95 = 928.46/x
  3. Step 3: Cross multiply
    1,201.97x = 1,802.95 × 928.46
  4. Step 4: Simplify right side
    1,201.97x = 1,673,957.94
  5. Step 5: Solve for x
    x = 1,673,957.94/1,201.97
  6. Step 6: Final answer
    x = 1,392.68

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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.