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Finding the Fourth Proportional to 1,203.08, 1,804.78 and 509.31

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Solution

The fourth proportional to 1,203.08, 1,804.78 and 509.31 is: 764.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,203.08 : 1,804.78 = 509.31 : x
  2. Step 2: Convert to fraction form
    1,203.08/1,804.78 = 509.31/x
  3. Step 3: Cross multiply
    1,203.08x = 1,804.78 × 509.31
  4. Step 4: Simplify right side
    1,203.08x = 919,191.23
  5. Step 5: Solve for x
    x = 919,191.23/1,203.08
  6. Step 6: Final answer
    x = 764.03

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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.