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Finding the Fourth Proportional to 933.13, 1,284.89 and 808.80

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Solution

The fourth proportional to 933.13, 1,284.89 and 808.80 is: 1,113.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    933.13 : 1,284.89 = 808.80 : x
  2. Step 2: Convert to fraction form
    933.13/1,284.89 = 808.80/x
  3. Step 3: Cross multiply
    933.13x = 1,284.89 × 808.80
  4. Step 4: Simplify right side
    933.13x = 1,039,219.03
  5. Step 5: Solve for x
    x = 1,039,219.03/933.13
  6. Step 6: Final answer
    x = 1,113.69

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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.