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Finding the Fourth Proportional to 402,778.69, 555,848.86 and 221,504.41

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Solution

The fourth proportional to 402,778.69, 555,848.86 and 221,504.41 is: 305,683.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    402,778.69 : 555,848.86 = 221,504.41 : x
  2. Step 2: Convert to fraction form
    402,778.69/555,848.86 = 221,504.41/x
  3. Step 3: Cross multiply
    402,778.69x = 555,848.86 × 221,504.41
  4. Step 4: Simplify right side
    402,778.69x = 123,122,972,675.95
  5. Step 5: Solve for x
    x = 123,122,972,675.95/402,778.69
  6. Step 6: Final answer
    x = 305,683.93

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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.