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Finding the Fourth Proportional to 389,695.50, 584,560.26 and 123,475.64

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Solution

The fourth proportional to 389,695.50, 584,560.26 and 123,475.64 is: 185,218.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,695.50 : 584,560.26 = 123,475.64 : x
  2. Step 2: Convert to fraction form
    389,695.50/584,560.26 = 123,475.64/x
  3. Step 3: Cross multiply
    389,695.50x = 584,560.26 × 123,475.64
  4. Step 4: Simplify right side
    389,695.50x = 72,178,949,299.27
  5. Step 5: Solve for x
    x = 72,178,949,299.27/389,695.50
  6. Step 6: Final answer
    x = 185,218.84

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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.