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Finding the Fourth Proportional to 448,321.99, 618,721.37 and 257,372.23

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Solution

The fourth proportional to 448,321.99, 618,721.37 and 257,372.23 is: 355,194.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    448,321.99 : 618,721.37 = 257,372.23 : x
  2. Step 2: Convert to fraction form
    448,321.99/618,721.37 = 257,372.23/x
  3. Step 3: Cross multiply
    448,321.99x = 618,721.37 × 257,372.23
  4. Step 4: Simplify right side
    448,321.99x = 159,241,698,745.56
  5. Step 5: Solve for x
    x = 159,241,698,745.56/448,321.99
  6. Step 6: Final answer
    x = 355,194.93

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1.5x scale

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.