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Finding the Fourth Proportional to 515,515.96, 772,885.14 and 338,067.64

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Solution

The fourth proportional to 515,515.96, 772,885.14 and 338,067.64 is: 506,846.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    515,515.96 : 772,885.14 = 338,067.64 : x
  2. Step 2: Convert to fraction form
    515,515.96/772,885.14 = 338,067.64/x
  3. Step 3: Cross multiply
    515,515.96x = 772,885.14 × 338,067.64
  4. Step 4: Simplify right side
    515,515.96x = 261,287,455,270.87
  5. Step 5: Solve for x
    x = 261,287,455,270.87/515,515.96
  6. Step 6: Final answer
    x = 506,846.49

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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.