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Finding the Fourth Proportional to 1,090.19, 1,633.32 and 917.93

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Solution

The fourth proportional to 1,090.19, 1,633.32 and 917.93 is: 1,375.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,090.19 : 1,633.32 = 917.93 : x
  2. Step 2: Convert to fraction form
    1,090.19/1,633.32 = 917.93/x
  3. Step 3: Cross multiply
    1,090.19x = 1,633.32 × 917.93
  4. Step 4: Simplify right side
    1,090.19x = 1,499,265.26
  5. Step 5: Solve for x
    x = 1,499,265.26/1,090.19
  6. Step 6: Final answer
    x = 1,375.24

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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.