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Finding the Fourth Proportional to 279,671.16, 385,933.74 and 163,395.42

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Solution

The fourth proportional to 279,671.16, 385,933.74 and 163,395.42 is: 225,478.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,671.16 : 385,933.74 = 163,395.42 : x
  2. Step 2: Convert to fraction form
    279,671.16/385,933.74 = 163,395.42/x
  3. Step 3: Cross multiply
    279,671.16x = 385,933.74 × 163,395.42
  4. Step 4: Simplify right side
    279,671.16x = 63,059,805,539.47
  5. Step 5: Solve for x
    x = 63,059,805,539.47/279,671.16
  6. Step 6: Final answer
    x = 225,478.40

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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.