Home / 1,292.27-1,783.23-768.20

Finding the Fourth Proportional to 1,292.27, 1,783.23 and 768.20

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Solution

The fourth proportional to 1,292.27, 1,783.23 and 768.20 is: 1,060.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,292.27 : 1,783.23 = 768.20 : x
  2. Step 2: Convert to fraction form
    1,292.27/1,783.23 = 768.20/x
  3. Step 3: Cross multiply
    1,292.27x = 1,783.23 × 768.20
  4. Step 4: Simplify right side
    1,292.27x = 1,369,868.37
  5. Step 5: Solve for x
    x = 1,369,868.37/1,292.27
  6. Step 6: Final answer
    x = 1,060.05

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.