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Finding the Fourth Proportional to 623.69, 860.69 and 361.86

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Solution

The fourth proportional to 623.69, 860.69 and 361.86 is: 499.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    623.69 : 860.69 = 361.86 : x
  2. Step 2: Convert to fraction form
    623.69/860.69 = 361.86/x
  3. Step 3: Cross multiply
    623.69x = 860.69 × 361.86
  4. Step 4: Simplify right side
    623.69x = 311,449.28
  5. Step 5: Solve for x
    x = 311,449.28/623.69
  6. Step 6: Final answer
    x = 499.37

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1.5x scale

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.