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Finding the Fourth Proportional to 620,085.22, 855,977.61 and 419,153.38

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Solution

The fourth proportional to 620,085.22, 855,977.61 and 419,153.38 is: 578,607.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,085.22 : 855,977.61 = 419,153.38 : x
  2. Step 2: Convert to fraction form
    620,085.22/855,977.61 = 419,153.38/x
  3. Step 3: Cross multiply
    620,085.22x = 855,977.61 × 419,153.38
  4. Step 4: Simplify right side
    620,085.22x = 358,785,908,435.82
  5. Step 5: Solve for x
    x = 358,785,908,435.82/620,085.22
  6. Step 6: Final answer
    x = 578,607.42

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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.