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Finding the Fourth Proportional to 307.04, 423.67 and 189.07

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Solution

The fourth proportional to 307.04, 423.67 and 189.07 is: 260.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    307.04 : 423.67 = 189.07 : x
  2. Step 2: Convert to fraction form
    307.04/423.67 = 189.07/x
  3. Step 3: Cross multiply
    307.04x = 423.67 × 189.07
  4. Step 4: Simplify right side
    307.04x = 80,103.29
  5. Step 5: Solve for x
    x = 80,103.29/307.04
  6. Step 6: Final answer
    x = 260.89

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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.