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Finding the Fourth Proportional to 1,446.19, 1,995.39 and 856.40

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Solution

The fourth proportional to 1,446.19, 1,995.39 and 856.40 is: 1,181.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,446.19 : 1,995.39 = 856.40 : x
  2. Step 2: Convert to fraction form
    1,446.19/1,995.39 = 856.40/x
  3. Step 3: Cross multiply
    1,446.19x = 1,995.39 × 856.40
  4. Step 4: Simplify right side
    1,446.19x = 1,708,842.02
  5. Step 5: Solve for x
    x = 1,708,842.02/1,446.19
  6. Step 6: Final answer
    x = 1,181.62

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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.