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Finding the Fourth Proportional to 1,904.42, 2,856.63 and 808.04

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Solution

The fourth proportional to 1,904.42, 2,856.63 and 808.04 is: 1,212.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,904.42 : 2,856.63 = 808.04 : x
  2. Step 2: Convert to fraction form
    1,904.42/2,856.63 = 808.04/x
  3. Step 3: Cross multiply
    1,904.42x = 2,856.63 × 808.04
  4. Step 4: Simplify right side
    1,904.42x = 2,308,257.02
  5. Step 5: Solve for x
    x = 2,308,257.02/1,904.42
  6. Step 6: Final answer
    x = 1,212.06

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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.