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Finding the Fourth Proportional to 1,200.58, 1,800.23 and 378.63

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Solution

The fourth proportional to 1,200.58, 1,800.23 and 378.63 is: 567.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,200.58 : 1,800.23 = 378.63 : x
  2. Step 2: Convert to fraction form
    1,200.58/1,800.23 = 378.63/x
  3. Step 3: Cross multiply
    1,200.58x = 1,800.23 × 378.63
  4. Step 4: Simplify right side
    1,200.58x = 681,621.08
  5. Step 5: Solve for x
    x = 681,621.08/1,200.58
  6. Step 6: Final answer
    x = 567.74

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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.