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Finding the Fourth Proportional to 623.43, 855.74 and 551.93

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Solution

The fourth proportional to 623.43, 855.74 and 551.93 is: 757.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    623.43 : 855.74 = 551.93 : x
  2. Step 2: Convert to fraction form
    623.43/855.74 = 551.93/x
  3. Step 3: Cross multiply
    623.43x = 855.74 × 551.93
  4. Step 4: Simplify right side
    623.43x = 472,308.58
  5. Step 5: Solve for x
    x = 472,308.58/623.43
  6. Step 6: Final answer
    x = 757.60

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.