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Finding the Fourth Proportional to 389,755.78, 584,650.07 and 123,526.80

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Solution

The fourth proportional to 389,755.78, 584,650.07 and 123,526.80 is: 185,295.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,755.78 : 584,650.07 = 123,526.80 : x
  2. Step 2: Convert to fraction form
    389,755.78/584,650.07 = 123,526.80/x
  3. Step 3: Cross multiply
    389,755.78x = 584,650.07 × 123,526.80
  4. Step 4: Simplify right side
    389,755.78x = 72,219,952,266.88
  5. Step 5: Solve for x
    x = 72,219,952,266.88/389,755.78
  6. Step 6: Final answer
    x = 185,295.40

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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.