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Finding the Fourth Proportional to 741.93, 1,113.15 and 279.84

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Solution

The fourth proportional to 741.93, 1,113.15 and 279.84 is: 419.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    741.93 : 1,113.15 = 279.84 : x
  2. Step 2: Convert to fraction form
    741.93/1,113.15 = 279.84/x
  3. Step 3: Cross multiply
    741.93x = 1,113.15 × 279.84
  4. Step 4: Simplify right side
    741.93x = 311,500.41
  5. Step 5: Solve for x
    x = 311,500.41/741.93
  6. Step 6: Final answer
    x = 419.85

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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.