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Finding the Fourth Proportional to 628,018.32, 866,646.75 and 356,111.04

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Solution

The fourth proportional to 628,018.32, 866,646.75 and 356,111.04 is: 491,422.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    628,018.32 : 866,646.75 = 356,111.04 : x
  2. Step 2: Convert to fraction form
    628,018.32/866,646.75 = 356,111.04/x
  3. Step 3: Cross multiply
    628,018.32x = 866,646.75 × 356,111.04
  4. Step 4: Simplify right side
    628,018.32x = 308,622,475,455.12
  5. Step 5: Solve for x
    x = 308,622,475,455.12/628,018.32
  6. Step 6: Final answer
    x = 491,422.73

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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.