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Finding the Fourth Proportional to 316,509.17, 436,790.34 and 173,268.77

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Solution

The fourth proportional to 316,509.17, 436,790.34 and 173,268.77 is: 239,115.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    316,509.17 : 436,790.34 = 173,268.77 : x
  2. Step 2: Convert to fraction form
    316,509.17/436,790.34 = 173,268.77/x
  3. Step 3: Cross multiply
    316,509.17x = 436,790.34 × 173,268.77
  4. Step 4: Simplify right side
    316,509.17x = 75,682,122,775.73
  5. Step 5: Solve for x
    x = 75,682,122,775.73/316,509.17
  6. Step 6: Final answer
    x = 239,115.11

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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.