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Finding the Fourth Proportional to 1,085.22, 1,497.51 and 613.15

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Solution

The fourth proportional to 1,085.22, 1,497.51 and 613.15 is: 846.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,085.22 : 1,497.51 = 613.15 : x
  2. Step 2: Convert to fraction form
    1,085.22/1,497.51 = 613.15/x
  3. Step 3: Cross multiply
    1,085.22x = 1,497.51 × 613.15
  4. Step 4: Simplify right side
    1,085.22x = 918,198.26
  5. Step 5: Solve for x
    x = 918,198.26/1,085.22
  6. Step 6: Final answer
    x = 846.09

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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.