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Finding the Fourth Proportional to 401,991.84, 554,749.70 and 220,715.44

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Solution

The fourth proportional to 401,991.84, 554,749.70 and 220,715.44 is: 304,587.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    401,991.84 : 554,749.70 = 220,715.44 : x
  2. Step 2: Convert to fraction form
    401,991.84/554,749.70 = 220,715.44/x
  3. Step 3: Cross multiply
    401,991.84x = 554,749.70 × 220,715.44
  4. Step 4: Simplify right side
    401,991.84x = 122,441,824,125.37
  5. Step 5: Solve for x
    x = 122,441,824,125.37/401,991.84
  6. Step 6: Final answer
    x = 304,587.83

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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.