Home / 1,280.56-1,768.08-1,116.94

Finding the Fourth Proportional to 1,280.56, 1,768.08 and 1,116.94

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Solution

The fourth proportional to 1,280.56, 1,768.08 and 1,116.94 is: 1,542.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,280.56 : 1,768.08 = 1,116.94 : x
  2. Step 2: Convert to fraction form
    1,280.56/1,768.08 = 1,116.94/x
  3. Step 3: Cross multiply
    1,280.56x = 1,768.08 × 1,116.94
  4. Step 4: Simplify right side
    1,280.56x = 1,974,839.28
  5. Step 5: Solve for x
    x = 1,974,839.28/1,280.56
  6. Step 6: Final answer
    x = 1,542.17

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1.5x scale

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.