Home / 1,513.04-2,270.21-820.20

Finding the Fourth Proportional to 1,513.04, 2,270.21 and 820.20

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Solution

The fourth proportional to 1,513.04, 2,270.21 and 820.20 is: 1,230.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,513.04 : 2,270.21 = 820.20 : x
  2. Step 2: Convert to fraction form
    1,513.04/2,270.21 = 820.20/x
  3. Step 3: Cross multiply
    1,513.04x = 2,270.21 × 820.20
  4. Step 4: Simplify right side
    1,513.04x = 1,862,026.24
  5. Step 5: Solve for x
    x = 1,862,026.24/1,513.04
  6. Step 6: Final answer
    x = 1,230.65

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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.