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Finding the Fourth Proportional to 491,384.90, 678,108.84 and 276,528.56

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Solution

The fourth proportional to 491,384.90, 678,108.84 and 276,528.56 is: 381,608.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    491,384.90 : 678,108.84 = 276,528.56 : x
  2. Step 2: Convert to fraction form
    491,384.90/678,108.84 = 276,528.56/x
  3. Step 3: Cross multiply
    491,384.90x = 678,108.84 × 276,528.56
  4. Step 4: Simplify right side
    491,384.90x = 187,516,461,048.47
  5. Step 5: Solve for x
    x = 187,516,461,048.47/491,384.90
  6. Step 6: Final answer
    x = 381,608.11

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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.