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Finding the Fourth Proportional to 317,930.70, 438,782.51 and 190,676.30

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Solution

The fourth proportional to 317,930.70, 438,782.51 and 190,676.30 is: 263,156.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    317,930.70 : 438,782.51 = 190,676.30 : x
  2. Step 2: Convert to fraction form
    317,930.70/438,782.51 = 190,676.30/x
  3. Step 3: Cross multiply
    317,930.70x = 438,782.51 × 190,676.30
  4. Step 4: Simplify right side
    317,930.70x = 83,665,425,511.51
  5. Step 5: Solve for x
    x = 83,665,425,511.51/317,930.70
  6. Step 6: Final answer
    x = 263,156.17

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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.