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Finding the Fourth Proportional to 1,166.13, 1,608.93 and 811.62

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Solution

The fourth proportional to 1,166.13, 1,608.93 and 811.62 is: 1,119.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,166.13 : 1,608.93 = 811.62 : x
  2. Step 2: Convert to fraction form
    1,166.13/1,608.93 = 811.62/x
  3. Step 3: Cross multiply
    1,166.13x = 1,608.93 × 811.62
  4. Step 4: Simplify right side
    1,166.13x = 1,305,839.77
  5. Step 5: Solve for x
    x = 1,305,839.77/1,166.13
  6. Step 6: Final answer
    x = 1,119.81

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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.