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Finding the Fourth Proportional to 620,918.14, 931,374.78 and 171,638.14

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Solution

The fourth proportional to 620,918.14, 931,374.78 and 171,638.14 is: 257,456.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,918.14 : 931,374.78 = 171,638.14 : x
  2. Step 2: Convert to fraction form
    620,918.14/931,374.78 = 171,638.14/x
  3. Step 3: Cross multiply
    620,918.14x = 931,374.78 × 171,638.14
  4. Step 4: Simplify right side
    620,918.14x = 159,859,434,882.11
  5. Step 5: Solve for x
    x = 159,859,434,882.11/620,918.14
  6. Step 6: Final answer
    x = 257,456.54

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1.5x scale

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.