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Finding the Fourth Proportional to 1,012.03, 1,396.86 and 658.83

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Solution

The fourth proportional to 1,012.03, 1,396.86 and 658.83 is: 909.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,012.03 : 1,396.86 = 658.83 : x
  2. Step 2: Convert to fraction form
    1,012.03/1,396.86 = 658.83/x
  3. Step 3: Cross multiply
    1,012.03x = 1,396.86 × 658.83
  4. Step 4: Simplify right side
    1,012.03x = 920,299.05
  5. Step 5: Solve for x
    x = 920,299.05/1,012.03
  6. Step 6: Final answer
    x = 909.36

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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.