Home / 1,501.20-2,251.80-405.54

Finding the Fourth Proportional to 1,501.20, 2,251.80 and 405.54

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Solution

The fourth proportional to 1,501.20, 2,251.80 and 405.54 is: 608.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,501.20 : 2,251.80 = 405.54 : x
  2. Step 2: Convert to fraction form
    1,501.20/2,251.80 = 405.54/x
  3. Step 3: Cross multiply
    1,501.20x = 2,251.80 × 405.54
  4. Step 4: Simplify right side
    1,501.20x = 913,194.97
  5. Step 5: Solve for x
    x = 913,194.97/1,501.20
  6. Step 6: Final answer
    x = 608.31

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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.