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Finding the Fourth Proportional to 804.56, 1,206.11 and 317.50

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Solution

The fourth proportional to 804.56, 1,206.11 and 317.50 is: 475.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    804.56 : 1,206.11 = 317.50 : x
  2. Step 2: Convert to fraction form
    804.56/1,206.11 = 317.50/x
  3. Step 3: Cross multiply
    804.56x = 1,206.11 × 317.50
  4. Step 4: Simplify right side
    804.56x = 382,939.93
  5. Step 5: Solve for x
    x = 382,939.93/804.56
  6. Step 6: Final answer
    x = 475.96

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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.