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Finding the Fourth Proportional to 603.18, 905.58 and 556.20

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Solution

The fourth proportional to 603.18, 905.58 and 556.20 is: 835.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    603.18 : 905.58 = 556.20 : x
  2. Step 2: Convert to fraction form
    603.18/905.58 = 556.20/x
  3. Step 3: Cross multiply
    603.18x = 905.58 × 556.20
  4. Step 4: Simplify right side
    603.18x = 503,683.60
  5. Step 5: Solve for x
    x = 503,683.60/603.18
  6. Step 6: Final answer
    x = 835.05

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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.