Home / 1,219.11-1,828.41-438.99

Finding the Fourth Proportional to 1,219.11, 1,828.41 and 438.99

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Solution

The fourth proportional to 1,219.11, 1,828.41 and 438.99 is: 658.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,219.11 : 1,828.41 = 438.99 : x
  2. Step 2: Convert to fraction form
    1,219.11/1,828.41 = 438.99/x
  3. Step 3: Cross multiply
    1,219.11x = 1,828.41 × 438.99
  4. Step 4: Simplify right side
    1,219.11x = 802,653.71
  5. Step 5: Solve for x
    x = 802,653.71/1,219.11
  6. Step 6: Final answer
    x = 658.39

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1.5x scale

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.