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Finding the Fourth Proportional to 321,690.15, 443,985.71 and 178,496.33

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Solution

The fourth proportional to 321,690.15, 443,985.71 and 178,496.33 is: 246,354.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    321,690.15 : 443,985.71 = 178,496.33 : x
  2. Step 2: Convert to fraction form
    321,690.15/443,985.71 = 178,496.33/x
  3. Step 3: Cross multiply
    321,690.15x = 443,985.71 × 178,496.33
  4. Step 4: Simplify right side
    321,690.15x = 79,249,816,695.03
  5. Step 5: Solve for x
    x = 79,249,816,695.03/321,690.15
  6. Step 6: Final answer
    x = 246,354.50

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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.