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Finding the Fourth Proportional to 347.63, 518.88 and 306.64

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Solution

The fourth proportional to 347.63, 518.88 and 306.64 is: 457.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    347.63 : 518.88 = 306.64 : x
  2. Step 2: Convert to fraction form
    347.63/518.88 = 306.64/x
  3. Step 3: Cross multiply
    347.63x = 518.88 × 306.64
  4. Step 4: Simplify right side
    347.63x = 159,105.24
  5. Step 5: Solve for x
    x = 159,105.24/347.63
  6. Step 6: Final answer
    x = 457.69

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.