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Finding the Fourth Proportional to 402,682.36, 555,705.45 and 221,395.54

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Solution

The fourth proportional to 402,682.36, 555,705.45 and 221,395.54 is: 305,527.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    402,682.36 : 555,705.45 = 221,395.54 : x
  2. Step 2: Convert to fraction form
    402,682.36/555,705.45 = 221,395.54/x
  3. Step 3: Cross multiply
    402,682.36x = 555,705.45 × 221,395.54
  4. Step 4: Simplify right side
    402,682.36x = 123,030,708,183.69
  5. Step 5: Solve for x
    x = 123,030,708,183.69/402,682.36
  6. Step 6: Final answer
    x = 305,527.93

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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.