Home / 3,369.10-5,051.49-1,420.78

Finding the Fourth Proportional to 3,369.10, 5,051.49 and 1,420.78

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Solution

The fourth proportional to 3,369.10, 5,051.49 and 1,420.78 is: 2,130.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,369.10 : 5,051.49 = 1,420.78 : x
  2. Step 2: Convert to fraction form
    3,369.10/5,051.49 = 1,420.78/x
  3. Step 3: Cross multiply
    3,369.10x = 5,051.49 × 1,420.78
  4. Step 4: Simplify right side
    3,369.10x = 7,177,055.96
  5. Step 5: Solve for x
    x = 7,177,055.96/3,369.10
  6. Step 6: Final answer
    x = 2,130.26

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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.