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Finding the Fourth Proportional to 291,245.17, 401,917.53 and 163,920.79

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Solution

The fourth proportional to 291,245.17, 401,917.53 and 163,920.79 is: 226,210.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    291,245.17 : 401,917.53 = 163,920.79 : x
  2. Step 2: Convert to fraction form
    291,245.17/401,917.53 = 163,920.79/x
  3. Step 3: Cross multiply
    291,245.17x = 401,917.53 × 163,920.79
  4. Step 4: Simplify right side
    291,245.17x = 65,882,639,032.45
  5. Step 5: Solve for x
    x = 65,882,639,032.45/291,245.17
  6. Step 6: Final answer
    x = 226,210.24

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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.