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Finding the Fourth Proportional to 279,688.40, 385,818.36 and 166,489.28

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Solution

The fourth proportional to 279,688.40, 385,818.36 and 166,489.28 is: 229,664.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,688.40 : 385,818.36 = 166,489.28 : x
  2. Step 2: Convert to fraction form
    279,688.40/385,818.36 = 166,489.28/x
  3. Step 3: Cross multiply
    279,688.40x = 385,818.36 × 166,489.28
  4. Step 4: Simplify right side
    279,688.40x = 64,234,620,967.18
  5. Step 5: Solve for x
    x = 64,234,620,967.18/279,688.40
  6. Step 6: Final answer
    x = 229,664.94

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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.