Home / 1,013.51-1,520.18-320.20

Finding the Fourth Proportional to 1,013.51, 1,520.18 and 320.20

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Solution

The fourth proportional to 1,013.51, 1,520.18 and 320.20 is: 480.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,013.51 : 1,520.18 = 320.20 : x
  2. Step 2: Convert to fraction form
    1,013.51/1,520.18 = 320.20/x
  3. Step 3: Cross multiply
    1,013.51x = 1,520.18 × 320.20
  4. Step 4: Simplify right side
    1,013.51x = 486,756.23
  5. Step 5: Solve for x
    x = 486,756.23/1,013.51
  6. Step 6: Final answer
    x = 480.27

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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.