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Finding the Fourth Proportional to 491,554.56, 678,346.80 and 276,697.92

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Solution

The fourth proportional to 491,554.56, 678,346.80 and 276,697.92 is: 381,843.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    491,554.56 : 678,346.80 = 276,697.92 : x
  2. Step 2: Convert to fraction form
    491,554.56/678,346.80 = 276,697.92/x
  3. Step 3: Cross multiply
    491,554.56x = 678,346.80 × 276,697.92
  4. Step 4: Simplify right side
    491,554.56x = 187,697,148,598.66
  5. Step 5: Solve for x
    x = 187,697,148,598.66/491,554.56
  6. Step 6: Final answer
    x = 381,843.98

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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.