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Finding the Fourth Proportional to 2,059.85, 3,087.55 and 890.40

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Solution

The fourth proportional to 2,059.85, 3,087.55 and 890.40 is: 1,334.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,059.85 : 3,087.55 = 890.40 : x
  2. Step 2: Convert to fraction form
    2,059.85/3,087.55 = 890.40/x
  3. Step 3: Cross multiply
    2,059.85x = 3,087.55 × 890.40
  4. Step 4: Simplify right side
    2,059.85x = 2,749,154.52
  5. Step 5: Solve for x
    x = 2,749,154.52/2,059.85
  6. Step 6: Final answer
    x = 1,334.64

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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.