Home / 1,355.26-2,029.62-921.10

Finding the Fourth Proportional to 1,355.26, 2,029.62 and 921.10

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Solution

The fourth proportional to 1,355.26, 2,029.62 and 921.10 is: 1,379.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,355.26 : 2,029.62 = 921.10 : x
  2. Step 2: Convert to fraction form
    1,355.26/2,029.62 = 921.10/x
  3. Step 3: Cross multiply
    1,355.26x = 2,029.62 × 921.10
  4. Step 4: Simplify right side
    1,355.26x = 1,869,482.98
  5. Step 5: Solve for x
    x = 1,869,482.98/1,355.26
  6. Step 6: Final answer
    x = 1,379.43

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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.