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Finding the Fourth Proportional to 643,199.10, 887,556.60 and 356,718.30

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Solution

The fourth proportional to 643,199.10, 887,556.60 and 356,718.30 is: 492,239.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,199.10 : 887,556.60 = 356,718.30 : x
  2. Step 2: Convert to fraction form
    643,199.10/887,556.60 = 356,718.30/x
  3. Step 3: Cross multiply
    643,199.10x = 887,556.60 × 356,718.30
  4. Step 4: Simplify right side
    643,199.10x = 316,607,681,505.78
  5. Step 5: Solve for x
    x = 316,607,681,505.78/643,199.10
  6. Step 6: Final answer
    x = 492,239.00

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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.