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Finding the Fourth Proportional to 221,587.28, 305,855.88 and 154,540.88

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Solution

The fourth proportional to 221,587.28, 305,855.88 and 154,540.88 is: 213,312.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,587.28 : 305,855.88 = 154,540.88 : x
  2. Step 2: Convert to fraction form
    221,587.28/305,855.88 = 154,540.88/x
  3. Step 3: Cross multiply
    221,587.28x = 305,855.88 × 154,540.88
  4. Step 4: Simplify right side
    221,587.28x = 47,267,236,848.37
  5. Step 5: Solve for x
    x = 47,267,236,848.37/221,587.28
  6. Step 6: Final answer
    x = 213,312.05

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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.