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Finding the Fourth Proportional to 388,647.73, 536,326.68 and 211,839.67

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Solution

The fourth proportional to 388,647.73, 536,326.68 and 211,839.67 is: 292,334.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,647.73 : 536,326.68 = 211,839.67 : x
  2. Step 2: Convert to fraction form
    388,647.73/536,326.68 = 211,839.67/x
  3. Step 3: Cross multiply
    388,647.73x = 536,326.68 × 211,839.67
  4. Step 4: Simplify right side
    388,647.73x = 113,615,266,903.40
  5. Step 5: Solve for x
    x = 113,615,266,903.40/388,647.73
  6. Step 6: Final answer
    x = 292,334.83

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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.