Home / 1,353.80-2,029.26-921.08

Finding the Fourth Proportional to 1,353.80, 2,029.26 and 921.08

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Solution

The fourth proportional to 1,353.80, 2,029.26 and 921.08 is: 1,380.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,353.80 : 2,029.26 = 921.08 : x
  2. Step 2: Convert to fraction form
    1,353.80/2,029.26 = 921.08/x
  3. Step 3: Cross multiply
    1,353.80x = 2,029.26 × 921.08
  4. Step 4: Simplify right side
    1,353.80x = 1,869,110.80
  5. Step 5: Solve for x
    x = 1,869,110.80/1,353.80
  6. Step 6: Final answer
    x = 1,380.64

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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.