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Finding the Fourth Proportional to 403,892.90, 557,364.95 and 220,133.12

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Solution

The fourth proportional to 403,892.90, 557,364.95 and 220,133.12 is: 303,779.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    403,892.90 : 557,364.95 = 220,133.12 : x
  2. Step 2: Convert to fraction form
    403,892.90/557,364.95 = 220,133.12/x
  3. Step 3: Cross multiply
    403,892.90x = 557,364.95 × 220,133.12
  4. Step 4: Simplify right side
    403,892.90x = 122,694,481,534.65
  5. Step 5: Solve for x
    x = 122,694,481,534.65/403,892.90
  6. Step 6: Final answer
    x = 303,779.75

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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.