Home / 1,284.93-1,911.85-1,280.43

Finding the Fourth Proportional to 1,284.93, 1,911.85 and 1,280.43

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Solution

The fourth proportional to 1,284.93, 1,911.85 and 1,280.43 is: 1,905.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,284.93 : 1,911.85 = 1,280.43 : x
  2. Step 2: Convert to fraction form
    1,284.93/1,911.85 = 1,280.43/x
  3. Step 3: Cross multiply
    1,284.93x = 1,911.85 × 1,280.43
  4. Step 4: Simplify right side
    1,284.93x = 2,447,986.89
  5. Step 5: Solve for x
    x = 2,447,986.89/1,284.93
  6. Step 6: Final answer
    x = 1,905.15

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.