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Finding the Fourth Proportional to 331,325.90, 496,988.85 and 278,837.90

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Solution

The fourth proportional to 331,325.90, 496,988.85 and 278,837.90 is: 418,256.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    331,325.90 : 496,988.85 = 278,837.90 : x
  2. Step 2: Convert to fraction form
    331,325.90/496,988.85 = 278,837.90/x
  3. Step 3: Cross multiply
    331,325.90x = 496,988.85 × 278,837.90
  4. Step 4: Simplify right side
    331,325.90x = 138,579,327,257.42
  5. Step 5: Solve for x
    x = 138,579,327,257.42/331,325.90
  6. Step 6: Final answer
    x = 418,256.85

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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.