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Finding the Fourth Proportional to 1,012.58, 1,397.17 and 570.32

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Solution

The fourth proportional to 1,012.58, 1,397.17 and 570.32 is: 786.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,012.58 : 1,397.17 = 570.32 : x
  2. Step 2: Convert to fraction form
    1,012.58/1,397.17 = 570.32/x
  3. Step 3: Cross multiply
    1,012.58x = 1,397.17 × 570.32
  4. Step 4: Simplify right side
    1,012.58x = 796,833.99
  5. Step 5: Solve for x
    x = 796,833.99/1,012.58
  6. Step 6: Final answer
    x = 786.93

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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.