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Finding the Fourth Proportional to 620,974.16, 856,443.12 and 416,963.60

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Solution

The fourth proportional to 620,974.16, 856,443.12 and 416,963.60 is: 575,073.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,974.16 : 856,443.12 = 416,963.60 : x
  2. Step 2: Convert to fraction form
    620,974.16/856,443.12 = 416,963.60/x
  3. Step 3: Cross multiply
    620,974.16x = 856,443.12 × 416,963.60
  4. Step 4: Simplify right side
    620,974.16x = 357,105,606,510.43
  5. Step 5: Solve for x
    x = 357,105,606,510.43/620,974.16
  6. Step 6: Final answer
    x = 575,073.21

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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.