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Finding the Fourth Proportional to 492.80, 700.80 and 492.80

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Solution

The fourth proportional to 492.80, 700.80 and 492.80 is: 700.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    492.80 : 700.80 = 492.80 : x
  2. Step 2: Convert to fraction form
    492.80/700.80 = 492.80/x
  3. Step 3: Cross multiply
    492.80x = 700.80 × 492.80
  4. Step 4: Simplify right side
    492.80x = 345,354.24
  5. Step 5: Solve for x
    x = 345,354.24/492.80
  6. Step 6: Final answer
    x = 700.80

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Why These Related Problems?

These problems maintain the same ratio (1.42) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.