Home / 1,218.95-1,828.44-439.50

Finding the Fourth Proportional to 1,218.95, 1,828.44 and 439.50

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Solution

The fourth proportional to 1,218.95, 1,828.44 and 439.50 is: 659.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,218.95 : 1,828.44 = 439.50 : x
  2. Step 2: Convert to fraction form
    1,218.95/1,828.44 = 439.50/x
  3. Step 3: Cross multiply
    1,218.95x = 1,828.44 × 439.50
  4. Step 4: Simplify right side
    1,218.95x = 803,599.38
  5. Step 5: Solve for x
    x = 803,599.38/1,218.95
  6. Step 6: Final answer
    x = 659.26

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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.