Home / 1,428.09-2,140.99-937.55

Finding the Fourth Proportional to 1,428.09, 2,140.99 and 937.55

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Solution

The fourth proportional to 1,428.09, 2,140.99 and 937.55 is: 1,405.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,428.09 : 2,140.99 = 937.55 : x
  2. Step 2: Convert to fraction form
    1,428.09/2,140.99 = 937.55/x
  3. Step 3: Cross multiply
    1,428.09x = 2,140.99 × 937.55
  4. Step 4: Simplify right side
    1,428.09x = 2,007,281.41
  5. Step 5: Solve for x
    x = 2,007,281.41/1,428.09
  6. Step 6: Final answer
    x = 1,405.57

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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.