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Finding the Fourth Proportional to 3,131.68, 4,697.52 and 823

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Solution

The fourth proportional to 3,131.68, 4,697.52 and 823 is: 1,234.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,131.68 : 4,697.52 = 823 : x
  2. Step 2: Convert to fraction form
    3,131.68/4,697.52 = 823/x
  3. Step 3: Cross multiply
    3,131.68x = 4,697.52 × 823
  4. Step 4: Simplify right side
    3,131.68x = 3,866,058.96
  5. Step 5: Solve for x
    x = 3,866,058.96/3,131.68
  6. Step 6: Final answer
    x = 1,234.50

Related Problems

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Half scale
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Double scale
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Similar ratio
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1.5x scale

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.