Home / 1,013.49-1,520.28-320.18

Finding the Fourth Proportional to 1,013.49, 1,520.28 and 320.18

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Solution

The fourth proportional to 1,013.49, 1,520.28 and 320.18 is: 480.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,013.49 : 1,520.28 = 320.18 : x
  2. Step 2: Convert to fraction form
    1,013.49/1,520.28 = 320.18/x
  3. Step 3: Cross multiply
    1,013.49x = 1,520.28 × 320.18
  4. Step 4: Simplify right side
    1,013.49x = 486,755.65
  5. Step 5: Solve for x
    x = 486,755.65/1,013.49
  6. Step 6: Final answer
    x = 480.28

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1.5x scale

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.