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Finding the Fourth Proportional to 623.95, 861.09 and 358.48

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Solution

The fourth proportional to 623.95, 861.09 and 358.48 is: 494.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    623.95 : 861.09 = 358.48 : x
  2. Step 2: Convert to fraction form
    623.95/861.09 = 358.48/x
  3. Step 3: Cross multiply
    623.95x = 861.09 × 358.48
  4. Step 4: Simplify right side
    623.95x = 308,683.54
  5. Step 5: Solve for x
    x = 308,683.54/623.95
  6. Step 6: Final answer
    x = 494.72

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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.