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Finding the Fourth Proportional to 1,102.98, 1,654.20 and 670.44

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Solution

The fourth proportional to 1,102.98, 1,654.20 and 670.44 is: 1,005.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,102.98 : 1,654.20 = 670.44 : x
  2. Step 2: Convert to fraction form
    1,102.98/1,654.20 = 670.44/x
  3. Step 3: Cross multiply
    1,102.98x = 1,654.20 × 670.44
  4. Step 4: Simplify right side
    1,102.98x = 1,109,041.85
  5. Step 5: Solve for x
    x = 1,109,041.85/1,102.98
  6. Step 6: Final answer
    x = 1,005.50

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1.5x scale

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.