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Finding the Fourth Proportional to 623.95, 861.04 and 344.20

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Solution

The fourth proportional to 623.95, 861.04 and 344.20 is: 474.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    623.95 : 861.04 = 344.20 : x
  2. Step 2: Convert to fraction form
    623.95/861.04 = 344.20/x
  3. Step 3: Cross multiply
    623.95x = 861.04 × 344.20
  4. Step 4: Simplify right side
    623.95x = 296,369.97
  5. Step 5: Solve for x
    x = 296,369.97/623.95
  6. Step 6: Final answer
    x = 474.99

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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.