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Finding the Fourth Proportional to 623.83, 860.47 and 361.66

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Solution

The fourth proportional to 623.83, 860.47 and 361.66 is: 498.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    623.83 : 860.47 = 361.66 : x
  2. Step 2: Convert to fraction form
    623.83/860.47 = 361.66/x
  3. Step 3: Cross multiply
    623.83x = 860.47 × 361.66
  4. Step 4: Simplify right side
    623.83x = 311,197.58
  5. Step 5: Solve for x
    x = 311,197.58/623.83
  6. Step 6: Final answer
    x = 498.85

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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.