Home / 2,160.57-3,242.11-911.08

Finding the Fourth Proportional to 2,160.57, 3,242.11 and 911.08

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Solution

The fourth proportional to 2,160.57, 3,242.11 and 911.08 is: 1,367.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,160.57 : 3,242.11 = 911.08 : x
  2. Step 2: Convert to fraction form
    2,160.57/3,242.11 = 911.08/x
  3. Step 3: Cross multiply
    2,160.57x = 3,242.11 × 911.08
  4. Step 4: Simplify right side
    2,160.57x = 2,953,836.74
  5. Step 5: Solve for x
    x = 2,953,836.74/2,160.57
  6. Step 6: Final answer
    x = 1,367.16

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1.5x scale

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.