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Finding the Fourth Proportional to 1,012.63, 1,396.15 and 825.93

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Solution

The fourth proportional to 1,012.63, 1,396.15 and 825.93 is: 1,138.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,012.63 : 1,396.15 = 825.93 : x
  2. Step 2: Convert to fraction form
    1,012.63/1,396.15 = 825.93/x
  3. Step 3: Cross multiply
    1,012.63x = 1,396.15 × 825.93
  4. Step 4: Simplify right side
    1,012.63x = 1,153,122.17
  5. Step 5: Solve for x
    x = 1,153,122.17/1,012.63
  6. Step 6: Final answer
    x = 1,138.74

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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.