Home / 1,428.18-1,971.76-1,339.94

Finding the Fourth Proportional to 1,428.18, 1,971.76 and 1,339.94

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Solution

The fourth proportional to 1,428.18, 1,971.76 and 1,339.94 is: 1,849.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,428.18 : 1,971.76 = 1,339.94 : x
  2. Step 2: Convert to fraction form
    1,428.18/1,971.76 = 1,339.94/x
  3. Step 3: Cross multiply
    1,428.18x = 1,971.76 × 1,339.94
  4. Step 4: Simplify right side
    1,428.18x = 2,642,040.09
  5. Step 5: Solve for x
    x = 2,642,040.09/1,428.18
  6. Step 6: Final answer
    x = 1,849.93

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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.