Home / 1,415.80-2,119.51-1,052.20

Finding the Fourth Proportional to 1,415.80, 2,119.51 and 1,052.20

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Solution

The fourth proportional to 1,415.80, 2,119.51 and 1,052.20 is: 1,575.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,415.80 : 2,119.51 = 1,052.20 : x
  2. Step 2: Convert to fraction form
    1,415.80/2,119.51 = 1,052.20/x
  3. Step 3: Cross multiply
    1,415.80x = 2,119.51 × 1,052.20
  4. Step 4: Simplify right side
    1,415.80x = 2,230,148.42
  5. Step 5: Solve for x
    x = 2,230,148.42/1,415.80
  6. Step 6: Final answer
    x = 1,575.19

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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.