Home / 385,283.62-531,747.81-221,908.72

Finding the Fourth Proportional to 385,283.62, 531,747.81 and 221,908.72

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Solution

The fourth proportional to 385,283.62, 531,747.81 and 221,908.72 is: 306,266.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    385,283.62 : 531,747.81 = 221,908.72 : x
  2. Step 2: Convert to fraction form
    385,283.62/531,747.81 = 221,908.72/x
  3. Step 3: Cross multiply
    385,283.62x = 531,747.81 × 221,908.72
  4. Step 4: Simplify right side
    385,283.62x = 117,999,475,879.90
  5. Step 5: Solve for x
    x = 117,999,475,879.90/385,283.62
  6. Step 6: Final answer
    x = 306,266.53

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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.