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Finding the Fourth Proportional to 261,396.80, 391,058.40 and 226,721.60

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Solution

The fourth proportional to 261,396.80, 391,058.40 and 226,721.60 is: 339,183.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,396.80 : 391,058.40 = 226,721.60 : x
  2. Step 2: Convert to fraction form
    261,396.80/391,058.40 = 226,721.60/x
  3. Step 3: Cross multiply
    261,396.80x = 391,058.40 × 226,721.60
  4. Step 4: Simplify right side
    261,396.80x = 88,661,386,141.44
  5. Step 5: Solve for x
    x = 88,661,386,141.44/261,396.80
  6. Step 6: Final answer
    x = 339,183.14

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1.5x scale

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.