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Finding the Fourth Proportional to 603.70, 905.55 and 556.90

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Solution

The fourth proportional to 603.70, 905.55 and 556.90 is: 835.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    603.70 : 905.55 = 556.90 : x
  2. Step 2: Convert to fraction form
    603.70/905.55 = 556.90/x
  3. Step 3: Cross multiply
    603.70x = 905.55 × 556.90
  4. Step 4: Simplify right side
    603.70x = 504,300.80
  5. Step 5: Solve for x
    x = 504,300.80/603.70
  6. Step 6: Final answer
    x = 835.35

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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.