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Finding the Fourth Proportional to 351,270, 526,905 and 129,654

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Solution

The fourth proportional to 351,270, 526,905 and 129,654 is: 194,481

Step by Step Solution

  1. Step 1: Write the proportion equation
    351,270 : 526,905 = 129,654 : x
  2. Step 2: Convert to fraction form
    351,270/526,905 = 129,654/x
  3. Step 3: Cross multiply
    351,270x = 526,905 × 129,654
  4. Step 4: Simplify right side
    351,270x = 68,315,340,870
  5. Step 5: Solve for x
    x = 68,315,340,870/351,270
  6. Step 6: Final answer
    x = 194,481

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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.