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Finding the Fourth Proportional to 402,561.54, 555,523.65 and 221,273.82

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Solution

The fourth proportional to 402,561.54, 555,523.65 and 221,273.82 is: 305,351.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    402,561.54 : 555,523.65 = 221,273.82 : x
  2. Step 2: Convert to fraction form
    402,561.54/555,523.65 = 221,273.82/x
  3. Step 3: Cross multiply
    402,561.54x = 555,523.65 × 221,273.82
  4. Step 4: Simplify right side
    402,561.54x = 122,922,840,135.84
  5. Step 5: Solve for x
    x = 122,922,840,135.84/402,561.54
  6. Step 6: Final answer
    x = 305,351.67

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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.