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Finding the Fourth Proportional to 310,631.91, 428,669.87 and 176,495.91

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Solution

The fourth proportional to 310,631.91, 428,669.87 and 176,495.91 is: 243,563.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    310,631.91 : 428,669.87 = 176,495.91 : x
  2. Step 2: Convert to fraction form
    310,631.91/428,669.87 = 176,495.91/x
  3. Step 3: Cross multiply
    310,631.91x = 428,669.87 × 176,495.91
  4. Step 4: Simplify right side
    310,631.91x = 75,658,477,912.75
  5. Step 5: Solve for x
    x = 75,658,477,912.75/310,631.91
  6. Step 6: Final answer
    x = 243,563.12

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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.