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Finding the Fourth Proportional to 804.30, 1,206.36 and 317.22

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Solution

The fourth proportional to 804.30, 1,206.36 and 317.22 is: 475.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    804.30 : 1,206.36 = 317.22 : x
  2. Step 2: Convert to fraction form
    804.30/1,206.36 = 317.22/x
  3. Step 3: Cross multiply
    804.30x = 1,206.36 × 317.22
  4. Step 4: Simplify right side
    804.30x = 382,681.52
  5. Step 5: Solve for x
    x = 382,681.52/804.30
  6. Step 6: Final answer
    x = 475.79

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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.