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Finding the Fourth Proportional to 1,203.26, 1,805.20 and 509.95

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Solution

The fourth proportional to 1,203.26, 1,805.20 and 509.95 is: 765.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,203.26 : 1,805.20 = 509.95 : x
  2. Step 2: Convert to fraction form
    1,203.26/1,805.20 = 509.95/x
  3. Step 3: Cross multiply
    1,203.26x = 1,805.20 × 509.95
  4. Step 4: Simplify right side
    1,203.26x = 920,557.23
  5. Step 5: Solve for x
    x = 920,557.23/1,203.26
  6. Step 6: Final answer
    x = 765.06

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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.