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Finding the Fourth Proportional to 801.35, 1,199.98 and 678.33

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Solution

The fourth proportional to 801.35, 1,199.98 and 678.33 is: 1,015.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    801.35 : 1,199.98 = 678.33 : x
  2. Step 2: Convert to fraction form
    801.35/1,199.98 = 678.33/x
  3. Step 3: Cross multiply
    801.35x = 1,199.98 × 678.33
  4. Step 4: Simplify right side
    801.35x = 813,980.51
  5. Step 5: Solve for x
    x = 813,980.51/801.35
  6. Step 6: Final answer
    x = 1,015.76

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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.