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Finding the Fourth Proportional to 212,813.80, 319,220.70 and 194,842.60

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Solution

The fourth proportional to 212,813.80, 319,220.70 and 194,842.60 is: 292,263.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,813.80 : 319,220.70 = 194,842.60 : x
  2. Step 2: Convert to fraction form
    212,813.80/319,220.70 = 194,842.60/x
  3. Step 3: Cross multiply
    212,813.80x = 319,220.70 × 194,842.60
  4. Step 4: Simplify right side
    212,813.80x = 62,197,791,161.82
  5. Step 5: Solve for x
    x = 62,197,791,161.82/212,813.80
  6. Step 6: Final answer
    x = 292,263.90

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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.