Home / 538,919.73-743,684.22-309,315.42

Finding the Fourth Proportional to 538,919.73, 743,684.22 and 309,315.42

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Solution

The fourth proportional to 538,919.73, 743,684.22 and 309,315.42 is: 426,840.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    538,919.73 : 743,684.22 = 309,315.42 : x
  2. Step 2: Convert to fraction form
    538,919.73/743,684.22 = 309,315.42/x
  3. Step 3: Cross multiply
    538,919.73x = 743,684.22 × 309,315.42
  4. Step 4: Simplify right side
    538,919.73x = 230,032,996,856.67
  5. Step 5: Solve for x
    x = 230,032,996,856.67/538,919.73
  6. Step 6: Final answer
    x = 426,840.93

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1.5x scale

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.