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Finding the Fourth Proportional to 628,054.16, 866,696.20 and 356,146.80

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Solution

The fourth proportional to 628,054.16, 866,696.20 and 356,146.80 is: 491,472.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    628,054.16 : 866,696.20 = 356,146.80 : x
  2. Step 2: Convert to fraction form
    628,054.16/866,696.20 = 356,146.80/x
  3. Step 3: Cross multiply
    628,054.16x = 866,696.20 × 356,146.80
  4. Step 4: Simplify right side
    628,054.16x = 308,671,078,202.16
  5. Step 5: Solve for x
    x = 308,671,078,202.16/628,054.16
  6. Step 6: Final answer
    x = 491,472.07

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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.