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Finding the Fourth Proportional to 323,857.30, 485,429.55 and 113,386.90

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Solution

The fourth proportional to 323,857.30, 485,429.55 and 113,386.90 is: 169,955.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    323,857.30 : 485,429.55 = 113,386.90 : x
  2. Step 2: Convert to fraction form
    323,857.30/485,429.55 = 113,386.90/x
  3. Step 3: Cross multiply
    323,857.30x = 485,429.55 × 113,386.90
  4. Step 4: Simplify right side
    323,857.30x = 55,041,351,842.90
  5. Step 5: Solve for x
    x = 55,041,351,842.90/323,857.30
  6. Step 6: Final answer
    x = 169,955.57

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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.