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Finding the Fourth Proportional to 385,251.04, 531,599.86 and 221,960.96

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Solution

The fourth proportional to 385,251.04, 531,599.86 and 221,960.96 is: 306,279.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    385,251.04 : 531,599.86 = 221,960.96 : x
  2. Step 2: Convert to fraction form
    385,251.04/531,599.86 = 221,960.96/x
  3. Step 3: Cross multiply
    385,251.04x = 531,599.86 × 221,960.96
  4. Step 4: Simplify right side
    385,251.04x = 117,994,415,261.47
  5. Step 5: Solve for x
    x = 117,994,415,261.47/385,251.04
  6. Step 6: Final answer
    x = 306,279.29

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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.