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Finding the Fourth Proportional to 401,388.90, 553,942.29 and 265,183.91

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Solution

The fourth proportional to 401,388.90, 553,942.29 and 265,183.91 is: 365,970.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    401,388.90 : 553,942.29 = 265,183.91 : x
  2. Step 2: Convert to fraction form
    401,388.90/553,942.29 = 265,183.91/x
  3. Step 3: Cross multiply
    401,388.90x = 553,942.29 × 265,183.91
  4. Step 4: Simplify right side
    401,388.90x = 146,896,579,606.84
  5. Step 5: Solve for x
    x = 146,896,579,606.84/401,388.90
  6. Step 6: Final answer
    x = 365,970.71

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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.