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Finding the Fourth Proportional to 1,012.67, 1,514.45 and 828.60

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Solution

The fourth proportional to 1,012.67, 1,514.45 and 828.60 is: 1,239.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,012.67 : 1,514.45 = 828.60 : x
  2. Step 2: Convert to fraction form
    1,012.67/1,514.45 = 828.60/x
  3. Step 3: Cross multiply
    1,012.67x = 1,514.45 × 828.60
  4. Step 4: Simplify right side
    1,012.67x = 1,254,873.27
  5. Step 5: Solve for x
    x = 1,254,873.27/1,012.67
  6. Step 6: Final answer
    x = 1,239.17

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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.