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Finding the Fourth Proportional to 688,353.32, 949,871.89 and 397,983.51

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Solution

The fourth proportional to 688,353.32, 949,871.89 and 397,983.51 is: 549,185.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    688,353.32 : 949,871.89 = 397,983.51 : x
  2. Step 2: Convert to fraction form
    688,353.32/949,871.89 = 397,983.51/x
  3. Step 3: Cross multiply
    688,353.32x = 949,871.89 × 397,983.51
  4. Step 4: Simplify right side
    688,353.32x = 378,033,350,085.60
  5. Step 5: Solve for x
    x = 378,033,350,085.60/688,353.32
  6. Step 6: Final answer
    x = 549,185.05

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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.