Home / 1,225.12-1,837.68-359.68

Finding the Fourth Proportional to 1,225.12, 1,837.68 and 359.68

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Solution

The fourth proportional to 1,225.12, 1,837.68 and 359.68 is: 539.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,225.12 : 1,837.68 = 359.68 : x
  2. Step 2: Convert to fraction form
    1,225.12/1,837.68 = 359.68/x
  3. Step 3: Cross multiply
    1,225.12x = 1,837.68 × 359.68
  4. Step 4: Simplify right side
    1,225.12x = 660,976.74
  5. Step 5: Solve for x
    x = 660,976.74/1,225.12
  6. Step 6: Final answer
    x = 539.52

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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.