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Finding the Fourth Proportional to 2,455.80, 3,683.88 and 812.88

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Solution

The fourth proportional to 2,455.80, 3,683.88 and 812.88 is: 1,219.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,455.80 : 3,683.88 = 812.88 : x
  2. Step 2: Convert to fraction form
    2,455.80/3,683.88 = 812.88/x
  3. Step 3: Cross multiply
    2,455.80x = 3,683.88 × 812.88
  4. Step 4: Simplify right side
    2,455.80x = 2,994,552.37
  5. Step 5: Solve for x
    x = 2,994,552.37/2,455.80
  6. Step 6: Final answer
    x = 1,219.38

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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.