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Finding the Fourth Proportional to 638,614, 957,921 and 259,740.87

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Solution

The fourth proportional to 638,614, 957,921 and 259,740.87 is: 389,611.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,614 : 957,921 = 259,740.87 : x
  2. Step 2: Convert to fraction form
    638,614/957,921 = 259,740.87/x
  3. Step 3: Cross multiply
    638,614x = 957,921 × 259,740.87
  4. Step 4: Simplify right side
    638,614x = 248,811,233,931.27
  5. Step 5: Solve for x
    x = 248,811,233,931.27/638,614
  6. Step 6: Final answer
    x = 389,611.31

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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.