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Finding the Fourth Proportional to 389,808.84, 537,936.21 and 210,960.84

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Solution

The fourth proportional to 389,808.84, 537,936.21 and 210,960.84 is: 291,125.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,808.84 : 537,936.21 = 210,960.84 : x
  2. Step 2: Convert to fraction form
    389,808.84/537,936.21 = 210,960.84/x
  3. Step 3: Cross multiply
    389,808.84x = 537,936.21 × 210,960.84
  4. Step 4: Simplify right side
    389,808.84x = 113,483,474,728.02
  5. Step 5: Solve for x
    x = 113,483,474,728.02/389,808.84
  6. Step 6: Final answer
    x = 291,125.97

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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.