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Finding the Fourth Proportional to 403,889.90, 557,360.81 and 220,130.12

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Solution

The fourth proportional to 403,889.90, 557,360.81 and 220,130.12 is: 303,775.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    403,889.90 : 557,360.81 = 220,130.12 : x
  2. Step 2: Convert to fraction form
    403,889.90/557,360.81 = 220,130.12/x
  3. Step 3: Cross multiply
    403,889.90x = 557,360.81 × 220,130.12
  4. Step 4: Simplify right side
    403,889.90x = 122,691,899,752.12
  5. Step 5: Solve for x
    x = 122,691,899,752.12/403,889.90
  6. Step 6: Final answer
    x = 303,775.61

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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.