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Finding the Fourth Proportional to 638,771.16, 881,281.61 and 409,454.90

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Solution

The fourth proportional to 638,771.16, 881,281.61 and 409,454.90 is: 564,905.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,771.16 : 881,281.61 = 409,454.90 : x
  2. Step 2: Convert to fraction form
    638,771.16/881,281.61 = 409,454.90/x
  3. Step 3: Cross multiply
    638,771.16x = 881,281.61 × 409,454.90
  4. Step 4: Simplify right side
    638,771.16x = 360,845,068,516.74
  5. Step 5: Solve for x
    x = 360,845,068,516.74/638,771.16
  6. Step 6: Final answer
    x = 564,905.07

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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.