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Finding the Fourth Proportional to 319,105.28, 478,714.84 and 105,886

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Solution

The fourth proportional to 319,105.28, 478,714.84 and 105,886 is: 158,847.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    319,105.28 : 478,714.84 = 105,886 : x
  2. Step 2: Convert to fraction form
    319,105.28/478,714.84 = 105,886/x
  3. Step 3: Cross multiply
    319,105.28x = 478,714.84 × 105,886
  4. Step 4: Simplify right side
    319,105.28x = 50,689,199,548.24
  5. Step 5: Solve for x
    x = 50,689,199,548.24/319,105.28
  6. Step 6: Final answer
    x = 158,847.89

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.