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Finding the Fourth Proportional to 1,012.15, 1,518.42 and 492.51

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Solution

The fourth proportional to 1,012.15, 1,518.42 and 492.51 is: 738.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,012.15 : 1,518.42 = 492.51 : x
  2. Step 2: Convert to fraction form
    1,012.15/1,518.42 = 492.51/x
  3. Step 3: Cross multiply
    1,012.15x = 1,518.42 × 492.51
  4. Step 4: Simplify right side
    1,012.15x = 747,837.03
  5. Step 5: Solve for x
    x = 747,837.03/1,012.15
  6. Step 6: Final answer
    x = 738.86

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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.