Home / 1,423.43-1,971.95-1,389.41

Finding the Fourth Proportional to 1,423.43, 1,971.95 and 1,389.41

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Solution

The fourth proportional to 1,423.43, 1,971.95 and 1,389.41 is: 1,924.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,423.43 : 1,971.95 = 1,389.41 : x
  2. Step 2: Convert to fraction form
    1,423.43/1,971.95 = 1,389.41/x
  3. Step 3: Cross multiply
    1,423.43x = 1,971.95 × 1,389.41
  4. Step 4: Simplify right side
    1,423.43x = 2,739,847.05
  5. Step 5: Solve for x
    x = 2,739,847.05/1,423.43
  6. Step 6: Final answer
    x = 1,924.82

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.