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Finding the Fourth Proportional to 706.50, 1,058.40 and 551.70

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Solution

The fourth proportional to 706.50, 1,058.40 and 551.70 is: 826.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    706.50 : 1,058.40 = 551.70 : x
  2. Step 2: Convert to fraction form
    706.50/1,058.40 = 551.70/x
  3. Step 3: Cross multiply
    706.50x = 1,058.40 × 551.70
  4. Step 4: Simplify right side
    706.50x = 583,919.28
  5. Step 5: Solve for x
    x = 583,919.28/706.50
  6. Step 6: Final answer
    x = 826.50

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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.