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Finding the Fourth Proportional to 718,512.64, 991,541.44 and 396,236.16

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Solution

The fourth proportional to 718,512.64, 991,541.44 and 396,236.16 is: 546,802.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    718,512.64 : 991,541.44 = 396,236.16 : x
  2. Step 2: Convert to fraction form
    718,512.64/991,541.44 = 396,236.16/x
  3. Step 3: Cross multiply
    718,512.64x = 991,541.44 × 396,236.16
  4. Step 4: Simplify right side
    718,512.64x = 392,884,572,666.47
  5. Step 5: Solve for x
    x = 392,884,572,666.47/718,512.64
  6. Step 6: Final answer
    x = 546,802.59

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.