Home / 1,434.39-2,151.71-394.40

Finding the Fourth Proportional to 1,434.39, 2,151.71 and 394.40

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Solution

The fourth proportional to 1,434.39, 2,151.71 and 394.40 is: 591.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,434.39 : 2,151.71 = 394.40 : x
  2. Step 2: Convert to fraction form
    1,434.39/2,151.71 = 394.40/x
  3. Step 3: Cross multiply
    1,434.39x = 2,151.71 × 394.40
  4. Step 4: Simplify right side
    1,434.39x = 848,634.42
  5. Step 5: Solve for x
    x = 848,634.42/1,434.39
  6. Step 6: Final answer
    x = 591.63

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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.