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Finding the Fourth Proportional to 638,524.02, 881,316.69 and 383,826

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Solution

The fourth proportional to 638,524.02, 881,316.69 and 383,826 is: 529,772.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,524.02 : 881,316.69 = 383,826 : x
  2. Step 2: Convert to fraction form
    638,524.02/881,316.69 = 383,826/x
  3. Step 3: Cross multiply
    638,524.02x = 881,316.69 × 383,826
  4. Step 4: Simplify right side
    638,524.02x = 338,272,259,855.94
  5. Step 5: Solve for x
    x = 338,272,259,855.94/638,524.02
  6. Step 6: Final answer
    x = 529,772.18

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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.