Home / 1,412.10-2,118.69-438.48

Finding the Fourth Proportional to 1,412.10, 2,118.69 and 438.48

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Solution

The fourth proportional to 1,412.10, 2,118.69 and 438.48 is: 657.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,412.10 : 2,118.69 = 438.48 : x
  2. Step 2: Convert to fraction form
    1,412.10/2,118.69 = 438.48/x
  3. Step 3: Cross multiply
    1,412.10x = 2,118.69 × 438.48
  4. Step 4: Simplify right side
    1,412.10x = 929,003.19
  5. Step 5: Solve for x
    x = 929,003.19/1,412.10
  6. Step 6: Final answer
    x = 657.89

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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.