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Finding the Fourth Proportional to 705.84, 1,056.96 and 551.28

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Solution

The fourth proportional to 705.84, 1,056.96 and 551.28 is: 825.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    705.84 : 1,056.96 = 551.28 : x
  2. Step 2: Convert to fraction form
    705.84/1,056.96 = 551.28/x
  3. Step 3: Cross multiply
    705.84x = 1,056.96 × 551.28
  4. Step 4: Simplify right side
    705.84x = 582,680.91
  5. Step 5: Solve for x
    x = 582,680.91/705.84
  6. Step 6: Final answer
    x = 825.51

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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.