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Finding the Fourth Proportional to 1,012.10, 1,519.12 and 492.39

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Solution

The fourth proportional to 1,012.10, 1,519.12 and 492.39 is: 739.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,012.10 : 1,519.12 = 492.39 : x
  2. Step 2: Convert to fraction form
    1,012.10/1,519.12 = 492.39/x
  3. Step 3: Cross multiply
    1,012.10x = 1,519.12 × 492.39
  4. Step 4: Simplify right side
    1,012.10x = 747,998.27
  5. Step 5: Solve for x
    x = 747,998.27/1,012.10
  6. Step 6: Final answer
    x = 739.05

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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.