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Finding the Fourth Proportional to 455.59, 683.74 and 317.74

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Solution

The fourth proportional to 455.59, 683.74 and 317.74 is: 476.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    455.59 : 683.74 = 317.74 : x
  2. Step 2: Convert to fraction form
    455.59/683.74 = 317.74/x
  3. Step 3: Cross multiply
    455.59x = 683.74 × 317.74
  4. Step 4: Simplify right side
    455.59x = 217,251.55
  5. Step 5: Solve for x
    x = 217,251.55/455.59
  6. Step 6: Final answer
    x = 476.86

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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.