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Finding the Fourth Proportional to 912.41, 1,368.09 and 449.18

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Solution

The fourth proportional to 912.41, 1,368.09 and 449.18 is: 673.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    912.41 : 1,368.09 = 449.18 : x
  2. Step 2: Convert to fraction form
    912.41/1,368.09 = 449.18/x
  3. Step 3: Cross multiply
    912.41x = 1,368.09 × 449.18
  4. Step 4: Simplify right side
    912.41x = 614,518.67
  5. Step 5: Solve for x
    x = 614,518.67/912.41
  6. Step 6: Final answer
    x = 673.51

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Double scale
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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.