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Finding the Fourth Proportional to 1,201.55, 1,800.48 and 891.95

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Solution

The fourth proportional to 1,201.55, 1,800.48 and 891.95 is: 1,336.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,201.55 : 1,800.48 = 891.95 : x
  2. Step 2: Convert to fraction form
    1,201.55/1,800.48 = 891.95/x
  3. Step 3: Cross multiply
    1,201.55x = 1,800.48 × 891.95
  4. Step 4: Simplify right side
    1,201.55x = 1,605,929.13
  5. Step 5: Solve for x
    x = 1,605,929.13/1,201.55
  6. Step 6: Final answer
    x = 1,336.55

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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.