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Finding the Fourth Proportional to 456.20, 683.80 and 347.64

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Solution

The fourth proportional to 456.20, 683.80 and 347.64 is: 521.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    456.20 : 683.80 = 347.64 : x
  2. Step 2: Convert to fraction form
    456.20/683.80 = 347.64/x
  3. Step 3: Cross multiply
    456.20x = 683.80 × 347.64
  4. Step 4: Simplify right side
    456.20x = 237,716.23
  5. Step 5: Solve for x
    x = 237,716.23/456.20
  6. Step 6: Final answer
    x = 521.08

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.