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Finding the Fourth Proportional to 402,648.63, 555,640.94 and 221,359.23

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Solution

The fourth proportional to 402,648.63, 555,640.94 and 221,359.23 is: 305,467.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    402,648.63 : 555,640.94 = 221,359.23 : x
  2. Step 2: Convert to fraction form
    402,648.63/555,640.94 = 221,359.23/x
  3. Step 3: Cross multiply
    402,648.63x = 555,640.94 × 221,359.23
  4. Step 4: Simplify right side
    402,648.63x = 122,996,250,634.88
  5. Step 5: Solve for x
    x = 122,996,250,634.88/402,648.63
  6. Step 6: Final answer
    x = 305,467.95

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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.