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Finding the Fourth Proportional to 456.20, 683.68 and 402.74

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Solution

The fourth proportional to 456.20, 683.68 and 402.74 is: 603.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    456.20 : 683.68 = 402.74 : x
  2. Step 2: Convert to fraction form
    456.20/683.68 = 402.74/x
  3. Step 3: Cross multiply
    456.20x = 683.68 × 402.74
  4. Step 4: Simplify right side
    456.20x = 275,345.28
  5. Step 5: Solve for x
    x = 275,345.28/456.20
  6. Step 6: Final answer
    x = 603.56

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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.