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Finding the Fourth Proportional to 328,404.60, 491,570.10 and 318,036.60

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Solution

The fourth proportional to 328,404.60, 491,570.10 and 318,036.60 is: 476,050.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    328,404.60 : 491,570.10 = 318,036.60 : x
  2. Step 2: Convert to fraction form
    328,404.60/491,570.10 = 318,036.60/x
  3. Step 3: Cross multiply
    328,404.60x = 491,570.10 × 318,036.60
  4. Step 4: Simplify right side
    328,404.60x = 156,337,283,265.66
  5. Step 5: Solve for x
    x = 156,337,283,265.66/328,404.60
  6. Step 6: Final answer
    x = 476,050.83

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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.