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Finding the Fourth Proportional to 603.20, 900.40 and 492.80

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Solution

The fourth proportional to 603.20, 900.40 and 492.80 is: 735.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    603.20 : 900.40 = 492.80 : x
  2. Step 2: Convert to fraction form
    603.20/900.40 = 492.80/x
  3. Step 3: Cross multiply
    603.20x = 900.40 × 492.80
  4. Step 4: Simplify right side
    603.20x = 443,717.12
  5. Step 5: Solve for x
    x = 443,717.12/603.20
  6. Step 6: Final answer
    x = 735.61

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.