Home / 1,914.77-2,643.21-1,216.14

Finding the Fourth Proportional to 1,914.77, 2,643.21 and 1,216.14

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Solution

The fourth proportional to 1,914.77, 2,643.21 and 1,216.14 is: 1,678.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,914.77 : 2,643.21 = 1,216.14 : x
  2. Step 2: Convert to fraction form
    1,914.77/2,643.21 = 1,216.14/x
  3. Step 3: Cross multiply
    1,914.77x = 2,643.21 × 1,216.14
  4. Step 4: Simplify right side
    1,914.77x = 3,214,513.41
  5. Step 5: Solve for x
    x = 3,214,513.41/1,914.77
  6. Step 6: Final answer
    x = 1,678.80

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Half scale
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Double scale
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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.