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Finding the Fourth Proportional to 306.52, 420.65 and 304.36

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Solution

The fourth proportional to 306.52, 420.65 and 304.36 is: 417.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    306.52 : 420.65 = 304.36 : x
  2. Step 2: Convert to fraction form
    306.52/420.65 = 304.36/x
  3. Step 3: Cross multiply
    306.52x = 420.65 × 304.36
  4. Step 4: Simplify right side
    306.52x = 128,029.03
  5. Step 5: Solve for x
    x = 128,029.03/306.52
  6. Step 6: Final answer
    x = 417.69

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.