Home / 1,351.55-1,865.68-1,020.05

Finding the Fourth Proportional to 1,351.55, 1,865.68 and 1,020.05

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Solution

The fourth proportional to 1,351.55, 1,865.68 and 1,020.05 is: 1,408.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,351.55 : 1,865.68 = 1,020.05 : x
  2. Step 2: Convert to fraction form
    1,351.55/1,865.68 = 1,020.05/x
  3. Step 3: Cross multiply
    1,351.55x = 1,865.68 × 1,020.05
  4. Step 4: Simplify right side
    1,351.55x = 1,903,089.00
  5. Step 5: Solve for x
    x = 1,903,089.00/1,351.55
  6. Step 6: Final answer
    x = 1,408.08

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.