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Finding the Fourth Proportional to 1,012.12, 1,396.79 and 570.04

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Solution

The fourth proportional to 1,012.12, 1,396.79 and 570.04 is: 786.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,012.12 : 1,396.79 = 570.04 : x
  2. Step 2: Convert to fraction form
    1,012.12/1,396.79 = 570.04/x
  3. Step 3: Cross multiply
    1,012.12x = 1,396.79 × 570.04
  4. Step 4: Simplify right side
    1,012.12x = 796,226.17
  5. Step 5: Solve for x
    x = 796,226.17/1,012.12
  6. Step 6: Final answer
    x = 786.69

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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.