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Finding the Fourth Proportional to 279,974.71, 386,365.51 and 152,650.31

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Solution

The fourth proportional to 279,974.71, 386,365.51 and 152,650.31 is: 210,657.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,974.71 : 386,365.51 = 152,650.31 : x
  2. Step 2: Convert to fraction form
    279,974.71/386,365.51 = 152,650.31/x
  3. Step 3: Cross multiply
    279,974.71x = 386,365.51 × 152,650.31
  4. Step 4: Simplify right side
    279,974.71x = 58,978,813,133.79
  5. Step 5: Solve for x
    x = 58,978,813,133.79/279,974.71
  6. Step 6: Final answer
    x = 210,657.64

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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.