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Finding the Fourth Proportional to 879.36, 1,317.52 and 570.88

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Solution

The fourth proportional to 879.36, 1,317.52 and 570.88 is: 855.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    879.36 : 1,317.52 = 570.88 : x
  2. Step 2: Convert to fraction form
    879.36/1,317.52 = 570.88/x
  3. Step 3: Cross multiply
    879.36x = 1,317.52 × 570.88
  4. Step 4: Simplify right side
    879.36x = 752,145.82
  5. Step 5: Solve for x
    x = 752,145.82/879.36
  6. Step 6: Final answer
    x = 855.33

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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.