Home / 1,330.91-1,837.08-911.10

Finding the Fourth Proportional to 1,330.91, 1,837.08 and 911.10

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Solution

The fourth proportional to 1,330.91, 1,837.08 and 911.10 is: 1,257.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,330.91 : 1,837.08 = 911.10 : x
  2. Step 2: Convert to fraction form
    1,330.91/1,837.08 = 911.10/x
  3. Step 3: Cross multiply
    1,330.91x = 1,837.08 × 911.10
  4. Step 4: Simplify right side
    1,330.91x = 1,673,763.59
  5. Step 5: Solve for x
    x = 1,673,763.59/1,330.91
  6. Step 6: Final answer
    x = 1,257.61

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.