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Finding the Fourth Proportional to 623.18, 860.28 and 361.15

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Solution

The fourth proportional to 623.18, 860.28 and 361.15 is: 498.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    623.18 : 860.28 = 361.15 : x
  2. Step 2: Convert to fraction form
    623.18/860.28 = 361.15/x
  3. Step 3: Cross multiply
    623.18x = 860.28 × 361.15
  4. Step 4: Simplify right side
    623.18x = 310,690.12
  5. Step 5: Solve for x
    x = 310,690.12/623.18
  6. Step 6: Final answer
    x = 498.56

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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.