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Finding the Fourth Proportional to 2,153.45, 3,230.19 and 766.84

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Solution

The fourth proportional to 2,153.45, 3,230.19 and 766.84 is: 1,150.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,153.45 : 3,230.19 = 766.84 : x
  2. Step 2: Convert to fraction form
    2,153.45/3,230.19 = 766.84/x
  3. Step 3: Cross multiply
    2,153.45x = 3,230.19 × 766.84
  4. Step 4: Simplify right side
    2,153.45x = 2,477,038.90
  5. Step 5: Solve for x
    x = 2,477,038.90/2,153.45
  6. Step 6: Final answer
    x = 1,150.27

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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.