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Finding the Fourth Proportional to 984.84, 1,476.32 and 551.08

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Solution

The fourth proportional to 984.84, 1,476.32 and 551.08 is: 826.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    984.84 : 1,476.32 = 551.08 : x
  2. Step 2: Convert to fraction form
    984.84/1,476.32 = 551.08/x
  3. Step 3: Cross multiply
    984.84x = 1,476.32 × 551.08
  4. Step 4: Simplify right side
    984.84x = 813,570.43
  5. Step 5: Solve for x
    x = 813,570.43/984.84
  6. Step 6: Final answer
    x = 826.09

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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.