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Finding the Fourth Proportional to 317,466.80, 438,123.88 and 209,850.20

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Solution

The fourth proportional to 317,466.80, 438,123.88 and 209,850.20 is: 289,606.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    317,466.80 : 438,123.88 = 209,850.20 : x
  2. Step 2: Convert to fraction form
    317,466.80/438,123.88 = 209,850.20/x
  3. Step 3: Cross multiply
    317,466.80x = 438,123.88 × 209,850.20
  4. Step 4: Simplify right side
    317,466.80x = 91,940,383,842.78
  5. Step 5: Solve for x
    x = 91,940,383,842.78/317,466.80
  6. Step 6: Final answer
    x = 289,606.30

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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.