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Finding the Fourth Proportional to 438,953.20, 605,804.58 and 247,978.90

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Solution

The fourth proportional to 438,953.20, 605,804.58 and 247,978.90 is: 342,238.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,953.20 : 605,804.58 = 247,978.90 : x
  2. Step 2: Convert to fraction form
    438,953.20/605,804.58 = 247,978.90/x
  3. Step 3: Cross multiply
    438,953.20x = 605,804.58 × 247,978.90
  4. Step 4: Simplify right side
    438,953.20x = 150,226,753,363.36
  5. Step 5: Solve for x
    x = 150,226,753,363.36/438,953.20
  6. Step 6: Final answer
    x = 342,238.66

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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.