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Finding the Fourth Proportional to 261,941.80, 392,912.70 and 209,453.80

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Solution

The fourth proportional to 261,941.80, 392,912.70 and 209,453.80 is: 314,180.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,941.80 : 392,912.70 = 209,453.80 : x
  2. Step 2: Convert to fraction form
    261,941.80/392,912.70 = 209,453.80/x
  3. Step 3: Cross multiply
    261,941.80x = 392,912.70 × 209,453.80
  4. Step 4: Simplify right side
    261,941.80x = 82,297,058,083.26
  5. Step 5: Solve for x
    x = 82,297,058,083.26/261,941.80
  6. Step 6: Final answer
    x = 314,180.70

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.