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Finding the Fourth Proportional to 389,889.56, 584,855.26 and 123,670.28

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Solution

The fourth proportional to 389,889.56, 584,855.26 and 123,670.28 is: 185,512.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,889.56 : 584,855.26 = 123,670.28 : x
  2. Step 2: Convert to fraction form
    389,889.56/584,855.26 = 123,670.28/x
  3. Step 3: Cross multiply
    389,889.56x = 584,855.26 × 123,670.28
  4. Step 4: Simplify right side
    389,889.56x = 72,329,213,763.67
  5. Step 5: Solve for x
    x = 72,329,213,763.67/389,889.56
  6. Step 6: Final answer
    x = 185,512.06

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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.