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Finding the Fourth Proportional to 623.91, 861.05 and 344.18

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Solution

The fourth proportional to 623.91, 861.05 and 344.18 is: 475.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    623.91 : 861.05 = 344.18 : x
  2. Step 2: Convert to fraction form
    623.91/861.05 = 344.18/x
  3. Step 3: Cross multiply
    623.91x = 861.05 × 344.18
  4. Step 4: Simplify right side
    623.91x = 296,359.20
  5. Step 5: Solve for x
    x = 296,359.20/623.91
  6. Step 6: Final answer
    x = 475.00

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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.