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Finding the Fourth Proportional to 1,090.80, 1,504.98 and 697.14

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Solution

The fourth proportional to 1,090.80, 1,504.98 and 697.14 is: 961.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,090.80 : 1,504.98 = 697.14 : x
  2. Step 2: Convert to fraction form
    1,090.80/1,504.98 = 697.14/x
  3. Step 3: Cross multiply
    1,090.80x = 1,504.98 × 697.14
  4. Step 4: Simplify right side
    1,090.80x = 1,049,181.76
  5. Step 5: Solve for x
    x = 1,049,181.76/1,090.80
  6. Step 6: Final answer
    x = 961.85

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.