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Finding the Fourth Proportional to 307.00, 423.77 and 213.75

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Solution

The fourth proportional to 307.00, 423.77 and 213.75 is: 295.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    307.00 : 423.77 = 213.75 : x
  2. Step 2: Convert to fraction form
    307.00/423.77 = 213.75/x
  3. Step 3: Cross multiply
    307.00x = 423.77 × 213.75
  4. Step 4: Simplify right side
    307.00x = 90,579.77
  5. Step 5: Solve for x
    x = 90,579.77/307.00
  6. Step 6: Final answer
    x = 295.05

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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.