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Finding the Fourth Proportional to 718,588.56, 991,697.68 and 396,299.28

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Solution

The fourth proportional to 718,588.56, 991,697.68 and 396,299.28 is: 546,918.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    718,588.56 : 991,697.68 = 396,299.28 : x
  2. Step 2: Convert to fraction form
    718,588.56/991,697.68 = 396,299.28/x
  3. Step 3: Cross multiply
    718,588.56x = 991,697.68 × 396,299.28
  4. Step 4: Simplify right side
    718,588.56x = 393,009,076,561.67
  5. Step 5: Solve for x
    x = 393,009,076,561.67/718,588.56
  6. Step 6: Final answer
    x = 546,918.08

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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.