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Finding the Fourth Proportional to 381,605.60, 572,692.80 and 145,409.60

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Solution

The fourth proportional to 381,605.60, 572,692.80 and 145,409.60 is: 218,222.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    381,605.60 : 572,692.80 = 145,409.60 : x
  2. Step 2: Convert to fraction form
    381,605.60/572,692.80 = 145,409.60/x
  3. Step 3: Cross multiply
    381,605.60x = 572,692.80 × 145,409.60
  4. Step 4: Simplify right side
    381,605.60x = 83,275,030,970.88
  5. Step 5: Solve for x
    x = 83,275,030,970.88/381,605.60
  6. Step 6: Final answer
    x = 218,222.77

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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.