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Finding the Fourth Proportional to 808.70, 1,213.14 and 295.58

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Solution

The fourth proportional to 808.70, 1,213.14 and 295.58 is: 443.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    808.70 : 1,213.14 = 295.58 : x
  2. Step 2: Convert to fraction form
    808.70/1,213.14 = 295.58/x
  3. Step 3: Cross multiply
    808.70x = 1,213.14 × 295.58
  4. Step 4: Simplify right side
    808.70x = 358,579.92
  5. Step 5: Solve for x
    x = 358,579.92/808.70
  6. Step 6: Final answer
    x = 443.40

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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.