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Finding the Fourth Proportional to 389,047.68, 583,352.64 and 122,758.56

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Solution

The fourth proportional to 389,047.68, 583,352.64 and 122,758.56 is: 184,068.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,047.68 : 583,352.64 = 122,758.56 : x
  2. Step 2: Convert to fraction form
    389,047.68/583,352.64 = 122,758.56/x
  3. Step 3: Cross multiply
    389,047.68x = 583,352.64 × 122,758.56
  4. Step 4: Simplify right side
    389,047.68x = 71,611,530,058.60
  5. Step 5: Solve for x
    x = 71,611,530,058.60/389,047.68
  6. Step 6: Final answer
    x = 184,068.78

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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.