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Finding the Fourth Proportional to 338,735.84, 508,103.96 and 86,035.28

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Solution

The fourth proportional to 338,735.84, 508,103.96 and 86,035.28 is: 129,052.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    338,735.84 : 508,103.96 = 86,035.28 : x
  2. Step 2: Convert to fraction form
    338,735.84/508,103.96 = 86,035.28/x
  3. Step 3: Cross multiply
    338,735.84x = 508,103.96 × 86,035.28
  4. Step 4: Simplify right side
    338,735.84x = 43,714,863,497.01
  5. Step 5: Solve for x
    x = 43,714,863,497.01/338,735.84
  6. Step 6: Final answer
    x = 129,052.96

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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.