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Finding the Fourth Proportional to 620,130.56, 855,651.48 and 405,585.92

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Solution

The fourth proportional to 620,130.56, 855,651.48 and 405,585.92 is: 559,624.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,130.56 : 855,651.48 = 405,585.92 : x
  2. Step 2: Convert to fraction form
    620,130.56/855,651.48 = 405,585.92/x
  3. Step 3: Cross multiply
    620,130.56x = 855,651.48 × 405,585.92
  4. Step 4: Simplify right side
    620,130.56x = 347,040,192,715.16
  5. Step 5: Solve for x
    x = 347,040,192,715.16/620,130.56
  6. Step 6: Final answer
    x = 559,624.40

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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.