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Finding the Fourth Proportional to 389,953.80, 547,116.30 and 389,953.80

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Solution

The fourth proportional to 389,953.80, 547,116.30 and 389,953.80 is: 547,116.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,953.80 : 547,116.30 = 389,953.80 : x
  2. Step 2: Convert to fraction form
    389,953.80/547,116.30 = 389,953.80/x
  3. Step 3: Cross multiply
    389,953.80x = 547,116.30 × 389,953.80
  4. Step 4: Simplify right side
    389,953.80x = 213,350,080,226.94
  5. Step 5: Solve for x
    x = 213,350,080,226.94/389,953.80
  6. Step 6: Final answer
    x = 547,116.30

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Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.