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Finding the Fourth Proportional to 623.78, 860.88 and 358.27

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Solution

The fourth proportional to 623.78, 860.88 and 358.27 is: 494.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    623.78 : 860.88 = 358.27 : x
  2. Step 2: Convert to fraction form
    623.78/860.88 = 358.27/x
  3. Step 3: Cross multiply
    623.78x = 860.88 × 358.27
  4. Step 4: Simplify right side
    623.78x = 308,427.48
  5. Step 5: Solve for x
    x = 308,427.48/623.78
  6. Step 6: Final answer
    x = 494.45

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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.