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Finding the Fourth Proportional to 1,106.76, 1,659.99 and 285.04

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Solution

The fourth proportional to 1,106.76, 1,659.99 and 285.04 is: 427.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,106.76 : 1,659.99 = 285.04 : x
  2. Step 2: Convert to fraction form
    1,106.76/1,659.99 = 285.04/x
  3. Step 3: Cross multiply
    1,106.76x = 1,659.99 × 285.04
  4. Step 4: Simplify right side
    1,106.76x = 473,163.55
  5. Step 5: Solve for x
    x = 473,163.55/1,106.76
  6. Step 6: Final answer
    x = 427.52

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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.