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Finding the Fourth Proportional to 438,907.68, 605,705.04 and 247,929.12

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Solution

The fourth proportional to 438,907.68, 605,705.04 and 247,929.12 is: 342,149.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,907.68 : 605,705.04 = 247,929.12 : x
  2. Step 2: Convert to fraction form
    438,907.68/605,705.04 = 247,929.12/x
  3. Step 3: Cross multiply
    438,907.68x = 605,705.04 × 247,929.12
  4. Step 4: Simplify right side
    438,907.68x = 150,171,917,546.77
  5. Step 5: Solve for x
    x = 150,171,917,546.77/438,907.68
  6. Step 6: Final answer
    x = 342,149.21

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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.