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Finding the Fourth Proportional to 638,774.64, 881,542.68 and 447,718.32

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Solution

The fourth proportional to 638,774.64, 881,542.68 and 447,718.32 is: 617,874.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,774.64 : 881,542.68 = 447,718.32 : x
  2. Step 2: Convert to fraction form
    638,774.64/881,542.68 = 447,718.32/x
  3. Step 3: Cross multiply
    638,774.64x = 881,542.68 × 447,718.32
  4. Step 4: Simplify right side
    638,774.64x = 394,682,807,697.90
  5. Step 5: Solve for x
    x = 394,682,807,697.90/638,774.64
  6. Step 6: Final answer
    x = 617,874.89

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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.