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Finding the Fourth Proportional to 2,868.50, 4,302.33 and 920.45

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Solution

The fourth proportional to 2,868.50, 4,302.33 and 920.45 is: 1,380.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,868.50 : 4,302.33 = 920.45 : x
  2. Step 2: Convert to fraction form
    2,868.50/4,302.33 = 920.45/x
  3. Step 3: Cross multiply
    2,868.50x = 4,302.33 × 920.45
  4. Step 4: Simplify right side
    2,868.50x = 3,960,058.14
  5. Step 5: Solve for x
    x = 3,960,058.14/2,868.50
  6. Step 6: Final answer
    x = 1,380.54

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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.