Home / 1,890.28-2,607.70-1,181.67

Finding the Fourth Proportional to 1,890.28, 2,607.70 and 1,181.67

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Solution

The fourth proportional to 1,890.28, 2,607.70 and 1,181.67 is: 1,630.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,890.28 : 2,607.70 = 1,181.67 : x
  2. Step 2: Convert to fraction form
    1,890.28/2,607.70 = 1,181.67/x
  3. Step 3: Cross multiply
    1,890.28x = 2,607.70 × 1,181.67
  4. Step 4: Simplify right side
    1,890.28x = 3,081,440.86
  5. Step 5: Solve for x
    x = 3,081,440.86/1,890.28
  6. Step 6: Final answer
    x = 1,630.15

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.