Home / 317,456.11-438,109.11-209,839.51

Finding the Fourth Proportional to 317,456.11, 438,109.11 and 209,839.51

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Solution

The fourth proportional to 317,456.11, 438,109.11 and 209,839.51 is: 289,591.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    317,456.11 : 438,109.11 = 209,839.51 : x
  2. Step 2: Convert to fraction form
    317,456.11/438,109.11 = 209,839.51/x
  3. Step 3: Cross multiply
    317,456.11x = 438,109.11 × 209,839.51
  4. Step 4: Simplify right side
    317,456.11x = 91,932,600,968.94
  5. Step 5: Solve for x
    x = 91,932,600,968.94/317,456.11
  6. Step 6: Final answer
    x = 289,591.53

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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.