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Finding the Fourth Proportional to 389,139.82, 536,989.82 and 225,783.68

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Solution

The fourth proportional to 389,139.82, 536,989.82 and 225,783.68 is: 311,568.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,139.82 : 536,989.82 = 225,783.68 : x
  2. Step 2: Convert to fraction form
    389,139.82/536,989.82 = 225,783.68/x
  3. Step 3: Cross multiply
    389,139.82x = 536,989.82 × 225,783.68
  4. Step 4: Simplify right side
    389,139.82x = 121,243,537,682.14
  5. Step 5: Solve for x
    x = 121,243,537,682.14/389,139.82
  6. Step 6: Final answer
    x = 311,568.06

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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.