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Finding the Fourth Proportional to 358,672.40, 538,008.60 and 331,638.80

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Solution

The fourth proportional to 358,672.40, 538,008.60 and 331,638.80 is: 497,458.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    358,672.40 : 538,008.60 = 331,638.80 : x
  2. Step 2: Convert to fraction form
    358,672.40/538,008.60 = 331,638.80/x
  3. Step 3: Cross multiply
    358,672.40x = 538,008.60 × 331,638.80
  4. Step 4: Simplify right side
    358,672.40x = 178,424,526,493.68
  5. Step 5: Solve for x
    x = 178,424,526,493.68/358,672.40
  6. Step 6: Final answer
    x = 497,458.20

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1.5x scale

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.