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Finding the Fourth Proportional to 280,395.88, 386,947.93 and 153,072.79

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Solution

The fourth proportional to 280,395.88, 386,947.93 and 153,072.79 is: 211,241.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,395.88 : 386,947.93 = 153,072.79 : x
  2. Step 2: Convert to fraction form
    280,395.88/386,947.93 = 153,072.79/x
  3. Step 3: Cross multiply
    280,395.88x = 386,947.93 × 153,072.79
  4. Step 4: Simplify right side
    280,395.88x = 59,231,199,229.82
  5. Step 5: Solve for x
    x = 59,231,199,229.82/280,395.88
  6. Step 6: Final answer
    x = 211,241.33

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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.