Home / 1,969.16-2,950.76-1,420.80

Finding the Fourth Proportional to 1,969.16, 2,950.76 and 1,420.80

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Solution

The fourth proportional to 1,969.16, 2,950.76 and 1,420.80 is: 2,129.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,969.16 : 2,950.76 = 1,420.80 : x
  2. Step 2: Convert to fraction form
    1,969.16/2,950.76 = 1,420.80/x
  3. Step 3: Cross multiply
    1,969.16x = 2,950.76 × 1,420.80
  4. Step 4: Simplify right side
    1,969.16x = 4,192,439.81
  5. Step 5: Solve for x
    x = 4,192,439.81/1,969.16
  6. Step 6: Final answer
    x = 2,129.05

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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.