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Finding the Fourth Proportional to 276,403.88, 381,456.72 and 155,556.80

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Solution

The fourth proportional to 276,403.88, 381,456.72 and 155,556.80 is: 214,679.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    276,403.88 : 381,456.72 = 155,556.80 : x
  2. Step 2: Convert to fraction form
    276,403.88/381,456.72 = 155,556.80/x
  3. Step 3: Cross multiply
    276,403.88x = 381,456.72 × 155,556.80
  4. Step 4: Simplify right side
    276,403.88x = 59,338,186,701.70
  5. Step 5: Solve for x
    x = 59,338,186,701.70/276,403.88
  6. Step 6: Final answer
    x = 214,679.28

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1.5x scale

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.