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Finding the Fourth Proportional to 353,278.28, 530,059 and 128,654.34

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Solution

The fourth proportional to 353,278.28, 530,059 and 128,654.34 is: 193,033.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    353,278.28 : 530,059 = 128,654.34 : x
  2. Step 2: Convert to fraction form
    353,278.28/530,059 = 128,654.34/x
  3. Step 3: Cross multiply
    353,278.28x = 530,059 × 128,654.34
  4. Step 4: Simplify right side
    353,278.28x = 68,194,390,806.06
  5. Step 5: Solve for x
    x = 68,194,390,806.06/353,278.28
  6. Step 6: Final answer
    x = 193,033.07

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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.