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Finding the Fourth Proportional to 808.72, 1,116.44 and 573.16

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Solution

The fourth proportional to 808.72, 1,116.44 and 573.16 is: 791.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    808.72 : 1,116.44 = 573.16 : x
  2. Step 2: Convert to fraction form
    808.72/1,116.44 = 573.16/x
  3. Step 3: Cross multiply
    808.72x = 1,116.44 × 573.16
  4. Step 4: Simplify right side
    808.72x = 639,898.75
  5. Step 5: Solve for x
    x = 639,898.75/808.72
  6. Step 6: Final answer
    x = 791.25

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Double scale
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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.