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Finding the Fourth Proportional to 804.18, 1,207.50 and 318.18

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Solution

The fourth proportional to 804.18, 1,207.50 and 318.18 is: 477.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    804.18 : 1,207.50 = 318.18 : x
  2. Step 2: Convert to fraction form
    804.18/1,207.50 = 318.18/x
  3. Step 3: Cross multiply
    804.18x = 1,207.50 × 318.18
  4. Step 4: Simplify right side
    804.18x = 384,202.35
  5. Step 5: Solve for x
    x = 384,202.35/804.18
  6. Step 6: Final answer
    x = 477.76

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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.