Home / 1,629.14-2,248.10-911.30

Finding the Fourth Proportional to 1,629.14, 2,248.10 and 911.30

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Solution

The fourth proportional to 1,629.14, 2,248.10 and 911.30 is: 1,257.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,629.14 : 2,248.10 = 911.30 : x
  2. Step 2: Convert to fraction form
    1,629.14/2,248.10 = 911.30/x
  3. Step 3: Cross multiply
    1,629.14x = 2,248.10 × 911.30
  4. Step 4: Simplify right side
    1,629.14x = 2,048,693.53
  5. Step 5: Solve for x
    x = 2,048,693.53/1,629.14
  6. Step 6: Final answer
    x = 1,257.53

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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.