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Finding the Fourth Proportional to 321,143.19, 442,928.12 and 219,250.77

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Solution

The fourth proportional to 321,143.19, 442,928.12 and 219,250.77 is: 302,395.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    321,143.19 : 442,928.12 = 219,250.77 : x
  2. Step 2: Convert to fraction form
    321,143.19/442,928.12 = 219,250.77/x
  3. Step 3: Cross multiply
    321,143.19x = 442,928.12 × 219,250.77
  4. Step 4: Simplify right side
    321,143.19x = 97,112,330,268.40
  5. Step 5: Solve for x
    x = 97,112,330,268.40/321,143.19
  6. Step 6: Final answer
    x = 302,395.73

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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.