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Finding the Fourth Proportional to 402,760.64, 555,790.64 and 221,480.24

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Solution

The fourth proportional to 402,760.64, 555,790.64 and 221,480.24 is: 305,632.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    402,760.64 : 555,790.64 = 221,480.24 : x
  2. Step 2: Convert to fraction form
    402,760.64/555,790.64 = 221,480.24/x
  3. Step 3: Cross multiply
    402,760.64x = 555,790.64 × 221,480.24
  4. Step 4: Simplify right side
    402,760.64x = 123,096,644,336.95
  5. Step 5: Solve for x
    x = 123,096,644,336.95/402,760.64
  6. Step 6: Final answer
    x = 305,632.26

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.