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Finding the Fourth Proportional to 603.70, 905.55 and 558.70

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Solution

The fourth proportional to 603.70, 905.55 and 558.70 is: 838.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    603.70 : 905.55 = 558.70 : x
  2. Step 2: Convert to fraction form
    603.70/905.55 = 558.70/x
  3. Step 3: Cross multiply
    603.70x = 905.55 × 558.70
  4. Step 4: Simplify right side
    603.70x = 505,930.79
  5. Step 5: Solve for x
    x = 505,930.79/603.70
  6. Step 6: Final answer
    x = 838.05

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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.