Home / 1,771.80-2,651.40-1,543.20

Finding the Fourth Proportional to 1,771.80, 2,651.40 and 1,543.20

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Solution

The fourth proportional to 1,771.80, 2,651.40 and 1,543.20 is: 2,309.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,771.80 : 2,651.40 = 1,543.20 : x
  2. Step 2: Convert to fraction form
    1,771.80/2,651.40 = 1,543.20/x
  3. Step 3: Cross multiply
    1,771.80x = 2,651.40 × 1,543.20
  4. Step 4: Simplify right side
    1,771.80x = 4,091,640.48
  5. Step 5: Solve for x
    x = 4,091,640.48/1,771.80
  6. Step 6: Final answer
    x = 2,309.31

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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.