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Finding the Fourth Proportional to 438,722.64, 605,451.24 and 269,128.08

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Solution

The fourth proportional to 438,722.64, 605,451.24 and 269,128.08 is: 371,405.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,722.64 : 605,451.24 = 269,128.08 : x
  2. Step 2: Convert to fraction form
    438,722.64/605,451.24 = 269,128.08/x
  3. Step 3: Cross multiply
    438,722.64x = 605,451.24 × 269,128.08
  4. Step 4: Simplify right side
    438,722.64x = 162,943,929,754.82
  5. Step 5: Solve for x
    x = 162,943,929,754.82/438,722.64
  6. Step 6: Final answer
    x = 371,405.34

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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.