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Finding the Fourth Proportional to 612,201.70, 918,302.55 and 443,365.30

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Solution

The fourth proportional to 612,201.70, 918,302.55 and 443,365.30 is: 665,047.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    612,201.70 : 918,302.55 = 443,365.30 : x
  2. Step 2: Convert to fraction form
    612,201.70/918,302.55 = 443,365.30/x
  3. Step 3: Cross multiply
    612,201.70x = 918,302.55 × 443,365.30
  4. Step 4: Simplify right side
    612,201.70x = 407,143,485,571.52
  5. Step 5: Solve for x
    x = 407,143,485,571.52/612,201.70
  6. Step 6: Final answer
    x = 665,047.95

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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.