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Finding the Fourth Proportional to 1,040.63, 1,436.09 and 574.88

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Solution

The fourth proportional to 1,040.63, 1,436.09 and 574.88 is: 793.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,040.63 : 1,436.09 = 574.88 : x
  2. Step 2: Convert to fraction form
    1,040.63/1,436.09 = 574.88/x
  3. Step 3: Cross multiply
    1,040.63x = 1,436.09 × 574.88
  4. Step 4: Simplify right side
    1,040.63x = 825,569.36
  5. Step 5: Solve for x
    x = 825,569.36/1,040.63
  6. Step 6: Final answer
    x = 793.34

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.