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Finding the Fourth Proportional to 401,740.78, 554,401.93 and 220,464.09

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Solution

The fourth proportional to 401,740.78, 554,401.93 and 220,464.09 is: 304,240.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    401,740.78 : 554,401.93 = 220,464.09 : x
  2. Step 2: Convert to fraction form
    401,740.78/554,401.93 = 220,464.09/x
  3. Step 3: Cross multiply
    401,740.78x = 554,401.93 × 220,464.09
  4. Step 4: Simplify right side
    401,740.78x = 122,225,716,991.69
  5. Step 5: Solve for x
    x = 122,225,716,991.69/401,740.78
  6. Step 6: Final answer
    x = 304,240.25

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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.