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Finding the Fourth Proportional to 620,665.46, 930,972.90 and 215,950.32

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Solution

The fourth proportional to 620,665.46, 930,972.90 and 215,950.32 is: 323,916.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,665.46 : 930,972.90 = 215,950.32 : x
  2. Step 2: Convert to fraction form
    620,665.46/930,972.90 = 215,950.32/x
  3. Step 3: Cross multiply
    620,665.46x = 930,972.90 × 215,950.32
  4. Step 4: Simplify right side
    620,665.46x = 201,043,895,666.33
  5. Step 5: Solve for x
    x = 201,043,895,666.33/620,665.46
  6. Step 6: Final answer
    x = 323,916.68

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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.