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Finding the Fourth Proportional to 1,355.66, 1,869.79 and 1,166.93

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Solution

The fourth proportional to 1,355.66, 1,869.79 and 1,166.93 is: 1,609.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,355.66 : 1,869.79 = 1,166.93 : x
  2. Step 2: Convert to fraction form
    1,355.66/1,869.79 = 1,166.93/x
  3. Step 3: Cross multiply
    1,355.66x = 1,869.79 × 1,166.93
  4. Step 4: Simplify right side
    1,355.66x = 2,181,917.06
  5. Step 5: Solve for x
    x = 2,181,917.06/1,355.66
  6. Step 6: Final answer
    x = 1,609.49

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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.