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Finding the Fourth Proportional to 492.04, 679.10 and 305.50

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Solution

The fourth proportional to 492.04, 679.10 and 305.50 is: 421.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    492.04 : 679.10 = 305.50 : x
  2. Step 2: Convert to fraction form
    492.04/679.10 = 305.50/x
  3. Step 3: Cross multiply
    492.04x = 679.10 × 305.50
  4. Step 4: Simplify right side
    492.04x = 207,465.05
  5. Step 5: Solve for x
    x = 207,465.05/492.04
  6. Step 6: Final answer
    x = 421.64

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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.