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Finding the Fourth Proportional to 402,612.25, 555,611.93 and 221,331.82

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Solution

The fourth proportional to 402,612.25, 555,611.93 and 221,331.82 is: 305,441.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    402,612.25 : 555,611.93 = 221,331.82 : x
  2. Step 2: Convert to fraction form
    402,612.25/555,611.93 = 221,331.82/x
  3. Step 3: Cross multiply
    402,612.25x = 555,611.93 × 221,331.82
  4. Step 4: Simplify right side
    402,612.25x = 122,974,599,680.61
  5. Step 5: Solve for x
    x = 122,974,599,680.61/402,612.25
  6. Step 6: Final answer
    x = 305,441.77

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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.