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Finding the Fourth Proportional to 635,752.60, 877,568.78 and 420,961.86

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Solution

The fourth proportional to 635,752.60, 877,568.78 and 420,961.86 is: 581,079.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    635,752.60 : 877,568.78 = 420,961.86 : x
  2. Step 2: Convert to fraction form
    635,752.60/877,568.78 = 420,961.86/x
  3. Step 3: Cross multiply
    635,752.60x = 877,568.78 × 420,961.86
  4. Step 4: Simplify right side
    635,752.60x = 369,422,986,959.14
  5. Step 5: Solve for x
    x = 369,422,986,959.14/635,752.60
  6. Step 6: Final answer
    x = 581,079.79

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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.