Home / 2,153.93-3,231.23-921.35

Finding the Fourth Proportional to 2,153.93, 3,231.23 and 921.35

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Solution

The fourth proportional to 2,153.93, 3,231.23 and 921.35 is: 1,382.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,153.93 : 3,231.23 = 921.35 : x
  2. Step 2: Convert to fraction form
    2,153.93/3,231.23 = 921.35/x
  3. Step 3: Cross multiply
    2,153.93x = 3,231.23 × 921.35
  4. Step 4: Simplify right side
    2,153.93x = 2,977,077.60
  5. Step 5: Solve for x
    x = 2,977,077.60/2,153.93
  6. Step 6: Final answer
    x = 1,382.16

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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.