Home / 2,380.90-3,570.80-900.28

Finding the Fourth Proportional to 2,380.90, 3,570.80 and 900.28

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Solution

The fourth proportional to 2,380.90, 3,570.80 and 900.28 is: 1,350.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,380.90 : 3,570.80 = 900.28 : x
  2. Step 2: Convert to fraction form
    2,380.90/3,570.80 = 900.28/x
  3. Step 3: Cross multiply
    2,380.90x = 3,570.80 × 900.28
  4. Step 4: Simplify right side
    2,380.90x = 3,214,719.82
  5. Step 5: Solve for x
    x = 3,214,719.82/2,380.90
  6. Step 6: Final answer
    x = 1,350.21

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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.