Home / 2,190.30-3,285.40-891.46

Finding the Fourth Proportional to 2,190.30, 3,285.40 and 891.46

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Solution

The fourth proportional to 2,190.30, 3,285.40 and 891.46 is: 1,337.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,190.30 : 3,285.40 = 891.46 : x
  2. Step 2: Convert to fraction form
    2,190.30/3,285.40 = 891.46/x
  3. Step 3: Cross multiply
    2,190.30x = 3,285.40 × 891.46
  4. Step 4: Simplify right side
    2,190.30x = 2,928,802.68
  5. Step 5: Solve for x
    x = 2,928,802.68/2,190.30
  6. Step 6: Final answer
    x = 1,337.17

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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.