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Finding the Fourth Proportional to 1,200.85, 1,798.58 and 731.05

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Solution

The fourth proportional to 1,200.85, 1,798.58 and 731.05 is: 1,094.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,200.85 : 1,798.58 = 731.05 : x
  2. Step 2: Convert to fraction form
    1,200.85/1,798.58 = 731.05/x
  3. Step 3: Cross multiply
    1,200.85x = 1,798.58 × 731.05
  4. Step 4: Simplify right side
    1,200.85x = 1,314,848.25
  5. Step 5: Solve for x
    x = 1,314,848.25/1,200.85
  6. Step 6: Final answer
    x = 1,094.93

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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.