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Finding the Fourth Proportional to 805.30, 1,207.95 and 228.19

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Solution

The fourth proportional to 805.30, 1,207.95 and 228.19 is: 342.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    805.30 : 1,207.95 = 228.19 : x
  2. Step 2: Convert to fraction form
    805.30/1,207.95 = 228.19/x
  3. Step 3: Cross multiply
    805.30x = 1,207.95 × 228.19
  4. Step 4: Simplify right side
    805.30x = 275,642.11
  5. Step 5: Solve for x
    x = 275,642.11/805.30
  6. Step 6: Final answer
    x = 342.29

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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.