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Finding the Fourth Proportional to 384,990.59, 531,271.78 and 212,897.39

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Solution

The fourth proportional to 384,990.59, 531,271.78 and 212,897.39 is: 293,789.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    384,990.59 : 531,271.78 = 212,897.39 : x
  2. Step 2: Convert to fraction form
    384,990.59/531,271.78 = 212,897.39/x
  3. Step 3: Cross multiply
    384,990.59x = 531,271.78 × 212,897.39
  4. Step 4: Simplify right side
    384,990.59x = 113,106,372,154.05
  5. Step 5: Solve for x
    x = 113,106,372,154.05/384,990.59
  6. Step 6: Final answer
    x = 293,789.96

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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.