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Finding the Fourth Proportional to 639,879.30, 958,436.55 and 529,287.30

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Solution

The fourth proportional to 639,879.30, 958,436.55 and 529,287.30 is: 792,787.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,879.30 : 958,436.55 = 529,287.30 : x
  2. Step 2: Convert to fraction form
    639,879.30/958,436.55 = 529,287.30/x
  3. Step 3: Cross multiply
    639,879.30x = 958,436.55 × 529,287.30
  4. Step 4: Simplify right side
    639,879.30x = 507,288,293,770.82
  5. Step 5: Solve for x
    x = 507,288,293,770.82/639,879.30
  6. Step 6: Final answer
    x = 792,787.47

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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.