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Finding the Fourth Proportional to 682.98, 1,023.66 and 317.00

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Solution

The fourth proportional to 682.98, 1,023.66 and 317.00 is: 475.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    682.98 : 1,023.66 = 317.00 : x
  2. Step 2: Convert to fraction form
    682.98/1,023.66 = 317.00/x
  3. Step 3: Cross multiply
    682.98x = 1,023.66 × 317.00
  4. Step 4: Simplify right side
    682.98x = 324,495.10
  5. Step 5: Solve for x
    x = 324,495.10/682.98
  6. Step 6: Final answer
    x = 475.12

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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.