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Finding the Fourth Proportional to 2,868.90, 4,303.35 and 920.85

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Solution

The fourth proportional to 2,868.90, 4,303.35 and 920.85 is: 1,381.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,868.90 : 4,303.35 = 920.85 : x
  2. Step 2: Convert to fraction form
    2,868.90/4,303.35 = 920.85/x
  3. Step 3: Cross multiply
    2,868.90x = 4,303.35 × 920.85
  4. Step 4: Simplify right side
    2,868.90x = 3,962,739.85
  5. Step 5: Solve for x
    x = 3,962,739.85/2,868.90
  6. Step 6: Final answer
    x = 1,381.28

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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.