Home / 389,992.49-537,669.20-309,685.85

Finding the Fourth Proportional to 389,992.49, 537,669.20 and 309,685.85

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Solution

The fourth proportional to 389,992.49, 537,669.20 and 309,685.85 is: 426,953.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,992.49 : 537,669.20 = 309,685.85 : x
  2. Step 2: Convert to fraction form
    389,992.49/537,669.20 = 309,685.85/x
  3. Step 3: Cross multiply
    389,992.49x = 537,669.20 × 309,685.85
  4. Step 4: Simplify right side
    389,992.49x = 166,508,541,672.39
  5. Step 5: Solve for x
    x = 166,508,541,672.39/389,992.49
  6. Step 6: Final answer
    x = 426,953.20

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.