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Finding the Fourth Proportional to 3,000.85, 4,500.97 and 920.87

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Solution

The fourth proportional to 3,000.85, 4,500.97 and 920.87 is: 1,381.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,000.85 : 4,500.97 = 920.87 : x
  2. Step 2: Convert to fraction form
    3,000.85/4,500.97 = 920.87/x
  3. Step 3: Cross multiply
    3,000.85x = 4,500.97 × 920.87
  4. Step 4: Simplify right side
    3,000.85x = 4,144,800.32
  5. Step 5: Solve for x
    x = 4,144,800.32/3,000.85
  6. Step 6: Final answer
    x = 1,381.21

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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.