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Finding the Fourth Proportional to 448,429.86, 618,832.89 and 257,454.90

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Solution

The fourth proportional to 448,429.86, 618,832.89 and 257,454.90 is: 355,287.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    448,429.86 : 618,832.89 = 257,454.90 : x
  2. Step 2: Convert to fraction form
    448,429.86/618,832.89 = 257,454.90/x
  3. Step 3: Cross multiply
    448,429.86x = 618,832.89 × 257,454.90
  4. Step 4: Simplify right side
    448,429.86x = 159,321,559,811.66
  5. Step 5: Solve for x
    x = 159,321,559,811.66/448,429.86
  6. Step 6: Final answer
    x = 355,287.58

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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.