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Finding the Fourth Proportional to 663,764.22, 916,065.18 and 405,792.18

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Solution

The fourth proportional to 663,764.22, 916,065.18 and 405,792.18 is: 560,036.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    663,764.22 : 916,065.18 = 405,792.18 : x
  2. Step 2: Convert to fraction form
    663,764.22/916,065.18 = 405,792.18/x
  3. Step 3: Cross multiply
    663,764.22x = 916,065.18 × 405,792.18
  4. Step 4: Simplify right side
    663,764.22x = 371,732,086,414.29
  5. Step 5: Solve for x
    x = 371,732,086,414.29/663,764.22
  6. Step 6: Final answer
    x = 560,036.34

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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.