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Finding the Fourth Proportional to 655,840.10, 905,123.88 and 383,891.51

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Solution

The fourth proportional to 655,840.10, 905,123.88 and 383,891.51 is: 529,808.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    655,840.10 : 905,123.88 = 383,891.51 : x
  2. Step 2: Convert to fraction form
    655,840.10/905,123.88 = 383,891.51/x
  3. Step 3: Cross multiply
    655,840.10x = 905,123.88 × 383,891.51
  4. Step 4: Simplify right side
    655,840.10x = 347,469,368,504.64
  5. Step 5: Solve for x
    x = 347,469,368,504.64/655,840.10
  6. Step 6: Final answer
    x = 529,808.06

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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.