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Finding the Fourth Proportional to 543,692.21, 815,089.30 and 239,869.85

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Solution

The fourth proportional to 543,692.21, 815,089.30 and 239,869.85 is: 359,606.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    543,692.21 : 815,089.30 = 239,869.85 : x
  2. Step 2: Convert to fraction form
    543,692.21/815,089.30 = 239,869.85/x
  3. Step 3: Cross multiply
    543,692.21x = 815,089.30 × 239,869.85
  4. Step 4: Simplify right side
    543,692.21x = 195,515,343,452.48
  5. Step 5: Solve for x
    x = 195,515,343,452.48/543,692.21
  6. Step 6: Final answer
    x = 359,606.67

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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.