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Finding the Fourth Proportional to 286.67, 429.86 and 103.99

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Solution

The fourth proportional to 286.67, 429.86 and 103.99 is: 155.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    286.67 : 429.86 = 103.99 : x
  2. Step 2: Convert to fraction form
    286.67/429.86 = 103.99/x
  3. Step 3: Cross multiply
    286.67x = 429.86 × 103.99
  4. Step 4: Simplify right side
    286.67x = 44,701.76
  5. Step 5: Solve for x
    x = 44,701.76/286.67
  6. Step 6: Final answer
    x = 155.93

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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.