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Finding the Fourth Proportional to 912.23, 1,368.37 and 254.11

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Solution

The fourth proportional to 912.23, 1,368.37 and 254.11 is: 381.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    912.23 : 1,368.37 = 254.11 : x
  2. Step 2: Convert to fraction form
    912.23/1,368.37 = 254.11/x
  3. Step 3: Cross multiply
    912.23x = 1,368.37 × 254.11
  4. Step 4: Simplify right side
    912.23x = 347,713.32
  5. Step 5: Solve for x
    x = 347,713.32/912.23
  6. Step 6: Final answer
    x = 381.17

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Double scale
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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.