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Finding the Fourth Proportional to 279,977.92, 386,361.12 and 152,656

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Solution

The fourth proportional to 279,977.92, 386,361.12 and 152,656 is: 210,660.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,977.92 : 386,361.12 = 152,656 : x
  2. Step 2: Convert to fraction form
    279,977.92/386,361.12 = 152,656/x
  3. Step 3: Cross multiply
    279,977.92x = 386,361.12 × 152,656
  4. Step 4: Simplify right side
    279,977.92x = 58,980,343,134.72
  5. Step 5: Solve for x
    x = 58,980,343,134.72/279,977.92
  6. Step 6: Final answer
    x = 210,660.69

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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.