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Finding the Fourth Proportional to 623.53, 860.88 and 387.73

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Solution

The fourth proportional to 623.53, 860.88 and 387.73 is: 535.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    623.53 : 860.88 = 387.73 : x
  2. Step 2: Convert to fraction form
    623.53/860.88 = 387.73/x
  3. Step 3: Cross multiply
    623.53x = 860.88 × 387.73
  4. Step 4: Simplify right side
    623.53x = 333,789.00
  5. Step 5: Solve for x
    x = 333,789.00/623.53
  6. Step 6: Final answer
    x = 535.32

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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.