Home / 1,425.50-2,138.57-438.46

Finding the Fourth Proportional to 1,425.50, 2,138.57 and 438.46

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Solution

The fourth proportional to 1,425.50, 2,138.57 and 438.46 is: 657.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,425.50 : 2,138.57 = 438.46 : x
  2. Step 2: Convert to fraction form
    1,425.50/2,138.57 = 438.46/x
  3. Step 3: Cross multiply
    1,425.50x = 2,138.57 × 438.46
  4. Step 4: Simplify right side
    1,425.50x = 937,671.51
  5. Step 5: Solve for x
    x = 937,671.51/1,425.50
  6. Step 6: Final answer
    x = 657.78

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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.