Home / 642,642.45-886,846.68-356,181.03

Finding the Fourth Proportional to 642,642.45, 886,846.68 and 356,181.03

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Solution

The fourth proportional to 642,642.45, 886,846.68 and 356,181.03 is: 491,529.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,642.45 : 886,846.68 = 356,181.03 : x
  2. Step 2: Convert to fraction form
    642,642.45/886,846.68 = 356,181.03/x
  3. Step 3: Cross multiply
    642,642.45x = 886,846.68 × 356,181.03
  4. Step 4: Simplify right side
    642,642.45x = 315,877,963,934.48
  5. Step 5: Solve for x
    x = 315,877,963,934.48/642,642.45
  6. Step 6: Final answer
    x = 491,529.88

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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.