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Finding the Fourth Proportional to 639,878.80, 958,435.80 and 529,286.80

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Solution

The fourth proportional to 639,878.80, 958,435.80 and 529,286.80 is: 792,786.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,878.80 : 958,435.80 = 529,286.80 : x
  2. Step 2: Convert to fraction form
    639,878.80/958,435.80 = 529,286.80/x
  3. Step 3: Cross multiply
    639,878.80x = 958,435.80 × 529,286.80
  4. Step 4: Simplify right side
    639,878.80x = 507,287,417,587.44
  5. Step 5: Solve for x
    x = 507,287,417,587.44/639,878.80
  6. Step 6: Final answer
    x = 792,786.72

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.