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Finding the Fourth Proportional to 603.53, 904.99 and 279.13

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Solution

The fourth proportional to 603.53, 904.99 and 279.13 is: 418.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    603.53 : 904.99 = 279.13 : x
  2. Step 2: Convert to fraction form
    603.53/904.99 = 279.13/x
  3. Step 3: Cross multiply
    603.53x = 904.99 × 279.13
  4. Step 4: Simplify right side
    603.53x = 252,609.86
  5. Step 5: Solve for x
    x = 252,609.86/603.53
  6. Step 6: Final answer
    x = 418.55

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.