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Finding the Fourth Proportional to 1,076.36, 1,613.19 and 491.19

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Solution

The fourth proportional to 1,076.36, 1,613.19 and 491.19 is: 736.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,076.36 : 1,613.19 = 491.19 : x
  2. Step 2: Convert to fraction form
    1,076.36/1,613.19 = 491.19/x
  3. Step 3: Cross multiply
    1,076.36x = 1,613.19 × 491.19
  4. Step 4: Simplify right side
    1,076.36x = 792,381.74
  5. Step 5: Solve for x
    x = 792,381.74/1,076.36
  6. Step 6: Final answer
    x = 736.17

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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.