Home / 1,384.14-1,911.99-1,285.74

Finding the Fourth Proportional to 1,384.14, 1,911.99 and 1,285.74

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Solution

The fourth proportional to 1,384.14, 1,911.99 and 1,285.74 is: 1,776.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,384.14 : 1,911.99 = 1,285.74 : x
  2. Step 2: Convert to fraction form
    1,384.14/1,911.99 = 1,285.74/x
  3. Step 3: Cross multiply
    1,384.14x = 1,911.99 × 1,285.74
  4. Step 4: Simplify right side
    1,384.14x = 2,458,322.02
  5. Step 5: Solve for x
    x = 2,458,322.02/1,384.14
  6. Step 6: Final answer
    x = 1,776.06

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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.