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Finding the Fourth Proportional to 389,310.30, 584,074.80 and 189,637.20

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Solution

The fourth proportional to 389,310.30, 584,074.80 and 189,637.20 is: 284,509.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,310.30 : 584,074.80 = 189,637.20 : x
  2. Step 2: Convert to fraction form
    389,310.30/584,074.80 = 189,637.20/x
  3. Step 3: Cross multiply
    389,310.30x = 584,074.80 × 189,637.20
  4. Step 4: Simplify right side
    389,310.30x = 110,762,309,662.56
  5. Step 5: Solve for x
    x = 110,762,309,662.56/389,310.30
  6. Step 6: Final answer
    x = 284,509.07

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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.