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Finding the Fourth Proportional to 279,686.92, 385,955.44 and 163,411.12

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Solution

The fourth proportional to 279,686.92, 385,955.44 and 163,411.12 is: 225,500.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,686.92 : 385,955.44 = 163,411.12 : x
  2. Step 2: Convert to fraction form
    279,686.92/385,955.44 = 163,411.12/x
  3. Step 3: Cross multiply
    279,686.92x = 385,955.44 × 163,411.12
  4. Step 4: Simplify right side
    279,686.92x = 63,069,410,720.49
  5. Step 5: Solve for x
    x = 63,069,410,720.49/279,686.92
  6. Step 6: Final answer
    x = 225,500.04

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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.