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Finding the Fourth Proportional to 1,090.83, 1,635.18 and 699.74

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Solution

The fourth proportional to 1,090.83, 1,635.18 and 699.74 is: 1,048.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,090.83 : 1,635.18 = 699.74 : x
  2. Step 2: Convert to fraction form
    1,090.83/1,635.18 = 699.74/x
  3. Step 3: Cross multiply
    1,090.83x = 1,635.18 × 699.74
  4. Step 4: Simplify right side
    1,090.83x = 1,144,192.68
  5. Step 5: Solve for x
    x = 1,144,192.68/1,090.83
  6. Step 6: Final answer
    x = 1,048.92

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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.