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Finding the Fourth Proportional to 1,110.87, 1,533 and 613.47

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Solution

The fourth proportional to 1,110.87, 1,533 and 613.47 is: 846.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,110.87 : 1,533 = 613.47 : x
  2. Step 2: Convert to fraction form
    1,110.87/1,533 = 613.47/x
  3. Step 3: Cross multiply
    1,110.87x = 1,533 × 613.47
  4. Step 4: Simplify right side
    1,110.87x = 940,449.51
  5. Step 5: Solve for x
    x = 940,449.51/1,110.87
  6. Step 6: Final answer
    x = 846.59

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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.