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Finding the Fourth Proportional to 620,778.41, 931,158.38 and 171,489.33

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Solution

The fourth proportional to 620,778.41, 931,158.38 and 171,489.33 is: 257,231.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,778.41 : 931,158.38 = 171,489.33 : x
  2. Step 2: Convert to fraction form
    620,778.41/931,158.38 = 171,489.33/x
  3. Step 3: Cross multiply
    620,778.41x = 931,158.38 × 171,489.33
  4. Step 4: Simplify right side
    620,778.41x = 159,683,726,710.09
  5. Step 5: Solve for x
    x = 159,683,726,710.09/620,778.41
  6. Step 6: Final answer
    x = 257,231.44

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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.