Home / 1,890.83-2,607.95-1,261.05

Finding the Fourth Proportional to 1,890.83, 2,607.95 and 1,261.05

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Solution

The fourth proportional to 1,890.83, 2,607.95 and 1,261.05 is: 1,739.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,890.83 : 2,607.95 = 1,261.05 : x
  2. Step 2: Convert to fraction form
    1,890.83/2,607.95 = 1,261.05/x
  3. Step 3: Cross multiply
    1,890.83x = 2,607.95 × 1,261.05
  4. Step 4: Simplify right side
    1,890.83x = 3,288,749.04
  5. Step 5: Solve for x
    x = 3,288,749.04/1,890.83
  6. Step 6: Final answer
    x = 1,739.32

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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.