Home / 1,783.22-2,462.21-1,389.56

Finding the Fourth Proportional to 1,783.22, 2,462.21 and 1,389.56

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Solution

The fourth proportional to 1,783.22, 2,462.21 and 1,389.56 is: 1,918.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,783.22 : 2,462.21 = 1,389.56 : x
  2. Step 2: Convert to fraction form
    1,783.22/2,462.21 = 1,389.56/x
  3. Step 3: Cross multiply
    1,783.22x = 2,462.21 × 1,389.56
  4. Step 4: Simplify right side
    1,783.22x = 3,421,369.27
  5. Step 5: Solve for x
    x = 3,421,369.27/1,783.22
  6. Step 6: Final answer
    x = 1,918.65

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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.