Home / 1,428.87-1,967.79-1,424.69

Finding the Fourth Proportional to 1,428.87, 1,967.79 and 1,424.69

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Solution

The fourth proportional to 1,428.87, 1,967.79 and 1,424.69 is: 1,962.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,428.87 : 1,967.79 = 1,424.69 : x
  2. Step 2: Convert to fraction form
    1,428.87/1,967.79 = 1,424.69/x
  3. Step 3: Cross multiply
    1,428.87x = 1,967.79 × 1,424.69
  4. Step 4: Simplify right side
    1,428.87x = 2,803,493.62
  5. Step 5: Solve for x
    x = 2,803,493.62/1,428.87
  6. Step 6: Final answer
    x = 1,962.03

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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.