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Finding the Fourth Proportional to 638,618, 957,927 and 259,744.88

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Solution

The fourth proportional to 638,618, 957,927 and 259,744.88 is: 389,617.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,618 : 957,927 = 259,744.88 : x
  2. Step 2: Convert to fraction form
    638,618/957,927 = 259,744.88/x
  3. Step 3: Cross multiply
    638,618x = 957,927 × 259,744.88
  4. Step 4: Simplify right side
    638,618x = 248,816,633,663.76
  5. Step 5: Solve for x
    x = 248,816,633,663.76/638,618
  6. Step 6: Final answer
    x = 389,617.32

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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.