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Finding the Fourth Proportional to 779.97, 1,170.48 and 585.11

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Solution

The fourth proportional to 779.97, 1,170.48 and 585.11 is: 878.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    779.97 : 1,170.48 = 585.11 : x
  2. Step 2: Convert to fraction form
    779.97/1,170.48 = 585.11/x
  3. Step 3: Cross multiply
    779.97x = 1,170.48 × 585.11
  4. Step 4: Simplify right side
    779.97x = 684,859.55
  5. Step 5: Solve for x
    x = 684,859.55/779.97
  6. Step 6: Final answer
    x = 878.06

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Double scale
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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.