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Finding the Fourth Proportional to 385,281.00, 531,744.18 and 221,906.10

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Solution

The fourth proportional to 385,281.00, 531,744.18 and 221,906.10 is: 306,262.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    385,281.00 : 531,744.18 = 221,906.10 : x
  2. Step 2: Convert to fraction form
    385,281.00/531,744.18 = 221,906.10/x
  3. Step 3: Cross multiply
    385,281.00x = 531,744.18 × 221,906.10
  4. Step 4: Simplify right side
    385,281.00x = 117,997,277,181.50
  5. Step 5: Solve for x
    x = 117,997,277,181.50/385,281.00
  6. Step 6: Final answer
    x = 306,262.91

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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.