Home / 1,412.52-2,118.69-438.59

Finding the Fourth Proportional to 1,412.52, 2,118.69 and 438.59

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Solution

The fourth proportional to 1,412.52, 2,118.69 and 438.59 is: 657.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,412.52 : 2,118.69 = 438.59 : x
  2. Step 2: Convert to fraction form
    1,412.52/2,118.69 = 438.59/x
  3. Step 3: Cross multiply
    1,412.52x = 2,118.69 × 438.59
  4. Step 4: Simplify right side
    1,412.52x = 929,225.65
  5. Step 5: Solve for x
    x = 929,225.65/1,412.52
  6. Step 6: Final answer
    x = 657.85

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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.