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Finding the Fourth Proportional to 624.70, 859.98 and 551.80

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Solution

The fourth proportional to 624.70, 859.98 and 551.80 is: 759.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    624.70 : 859.98 = 551.80 : x
  2. Step 2: Convert to fraction form
    624.70/859.98 = 551.80/x
  3. Step 3: Cross multiply
    624.70x = 859.98 × 551.80
  4. Step 4: Simplify right side
    624.70x = 474,536.96
  5. Step 5: Solve for x
    x = 474,536.96/624.70
  6. Step 6: Final answer
    x = 759.62

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.