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Finding the Fourth Proportional to 379,655.72, 523,935.90 and 209,900.84

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Solution

The fourth proportional to 379,655.72, 523,935.90 and 209,900.84 is: 289,669.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    379,655.72 : 523,935.90 = 209,900.84 : x
  2. Step 2: Convert to fraction form
    379,655.72/523,935.90 = 209,900.84/x
  3. Step 3: Cross multiply
    379,655.72x = 523,935.90 × 209,900.84
  4. Step 4: Simplify right side
    379,655.72x = 109,974,585,516.16
  5. Step 5: Solve for x
    x = 109,974,585,516.16/379,655.72
  6. Step 6: Final answer
    x = 289,669.24

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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.