Home / 1,905.12-2,856.16-1,251.06

Finding the Fourth Proportional to 1,905.12, 2,856.16 and 1,251.06

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Solution

The fourth proportional to 1,905.12, 2,856.16 and 1,251.06 is: 1,875.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,905.12 : 2,856.16 = 1,251.06 : x
  2. Step 2: Convert to fraction form
    1,905.12/2,856.16 = 1,251.06/x
  3. Step 3: Cross multiply
    1,905.12x = 2,856.16 × 1,251.06
  4. Step 4: Simplify right side
    1,905.12x = 3,573,227.53
  5. Step 5: Solve for x
    x = 3,573,227.53/1,905.12
  6. Step 6: Final answer
    x = 1,875.59

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.