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Finding the Fourth Proportional to 580.20, 868.70 and 551.40

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Solution

The fourth proportional to 580.20, 868.70 and 551.40 is: 825.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    580.20 : 868.70 = 551.40 : x
  2. Step 2: Convert to fraction form
    580.20/868.70 = 551.40/x
  3. Step 3: Cross multiply
    580.20x = 868.70 × 551.40
  4. Step 4: Simplify right side
    580.20x = 479,001.18
  5. Step 5: Solve for x
    x = 479,001.18/580.20
  6. Step 6: Final answer
    x = 825.58

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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.