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Finding the Fourth Proportional to 448,915.86, 618,649.11 and 321,370.02

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Solution

The fourth proportional to 448,915.86, 618,649.11 and 321,370.02 is: 442,878.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    448,915.86 : 618,649.11 = 321,370.02 : x
  2. Step 2: Convert to fraction form
    448,915.86/618,649.11 = 321,370.02/x
  3. Step 3: Cross multiply
    448,915.86x = 618,649.11 × 321,370.02
  4. Step 4: Simplify right side
    448,915.86x = 198,815,276,853.68
  5. Step 5: Solve for x
    x = 198,815,276,853.68/448,915.86
  6. Step 6: Final answer
    x = 442,878.71

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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.