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Finding the Fourth Proportional to 623.69, 860.63 and 361.71

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Solution

The fourth proportional to 623.69, 860.63 and 361.71 is: 499.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    623.69 : 860.63 = 361.71 : x
  2. Step 2: Convert to fraction form
    623.69/860.63 = 361.71/x
  3. Step 3: Cross multiply
    623.69x = 860.63 × 361.71
  4. Step 4: Simplify right side
    623.69x = 311,296.67
  5. Step 5: Solve for x
    x = 311,296.67/623.69
  6. Step 6: Final answer
    x = 499.12

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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.