Home / 2,190.18-3,285.52-891.34

Finding the Fourth Proportional to 2,190.18, 3,285.52 and 891.34

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Solution

The fourth proportional to 2,190.18, 3,285.52 and 891.34 is: 1,337.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,190.18 : 3,285.52 = 891.34 : x
  2. Step 2: Convert to fraction form
    2,190.18/3,285.52 = 891.34/x
  3. Step 3: Cross multiply
    2,190.18x = 3,285.52 × 891.34
  4. Step 4: Simplify right side
    2,190.18x = 2,928,515.40
  5. Step 5: Solve for x
    x = 2,928,515.40/2,190.18
  6. Step 6: Final answer
    x = 1,337.11

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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.