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Finding the Fourth Proportional to 984.08, 1,476.34 and 290.76

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Solution

The fourth proportional to 984.08, 1,476.34 and 290.76 is: 436.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    984.08 : 1,476.34 = 290.76 : x
  2. Step 2: Convert to fraction form
    984.08/1,476.34 = 290.76/x
  3. Step 3: Cross multiply
    984.08x = 1,476.34 × 290.76
  4. Step 4: Simplify right side
    984.08x = 429,260.62
  5. Step 5: Solve for x
    x = 429,260.62/984.08
  6. Step 6: Final answer
    x = 436.21

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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.