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Finding the Fourth Proportional to 1,353.37, 2,029.92 and 917.42

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Solution

The fourth proportional to 1,353.37, 2,029.92 and 917.42 is: 1,376.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,353.37 : 2,029.92 = 917.42 : x
  2. Step 2: Convert to fraction form
    1,353.37/2,029.92 = 917.42/x
  3. Step 3: Cross multiply
    1,353.37x = 2,029.92 × 917.42
  4. Step 4: Simplify right side
    1,353.37x = 1,862,288.19
  5. Step 5: Solve for x
    x = 1,862,288.19/1,353.37
  6. Step 6: Final answer
    x = 1,376.04

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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.