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Finding the Fourth Proportional to 603.99, 833.22 and 407.57

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Solution

The fourth proportional to 603.99, 833.22 and 407.57 is: 562.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    603.99 : 833.22 = 407.57 : x
  2. Step 2: Convert to fraction form
    603.99/833.22 = 407.57/x
  3. Step 3: Cross multiply
    603.99x = 833.22 × 407.57
  4. Step 4: Simplify right side
    603.99x = 339,591.31
  5. Step 5: Solve for x
    x = 339,591.31/603.99
  6. Step 6: Final answer
    x = 562.25

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.