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Finding the Fourth Proportional to 623.76, 860.78 and 344.00

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Solution

The fourth proportional to 623.76, 860.78 and 344.00 is: 474.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    623.76 : 860.78 = 344.00 : x
  2. Step 2: Convert to fraction form
    623.76/860.78 = 344.00/x
  3. Step 3: Cross multiply
    623.76x = 860.78 × 344.00
  4. Step 4: Simplify right side
    623.76x = 296,102.30
  5. Step 5: Solve for x
    x = 296,102.30/623.76
  6. Step 6: Final answer
    x = 474.71

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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.