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Finding the Fourth Proportional to 307.53, 423.42 and 260.81

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Solution

The fourth proportional to 307.53, 423.42 and 260.81 is: 359.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    307.53 : 423.42 = 260.81 : x
  2. Step 2: Convert to fraction form
    307.53/423.42 = 260.81/x
  3. Step 3: Cross multiply
    307.53x = 423.42 × 260.81
  4. Step 4: Simplify right side
    307.53x = 110,430.05
  5. Step 5: Solve for x
    x = 110,430.05/307.53
  6. Step 6: Final answer
    x = 359.09

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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.