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Finding the Fourth Proportional to 508,449.88, 701,989.52 and 315,062.80

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Solution

The fourth proportional to 508,449.88, 701,989.52 and 315,062.80 is: 434,990.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    508,449.88 : 701,989.52 = 315,062.80 : x
  2. Step 2: Convert to fraction form
    508,449.88/701,989.52 = 315,062.80/x
  3. Step 3: Cross multiply
    508,449.88x = 701,989.52 × 315,062.80
  4. Step 4: Simplify right side
    508,449.88x = 221,170,783,741.86
  5. Step 5: Solve for x
    x = 221,170,783,741.86/508,449.88
  6. Step 6: Final answer
    x = 434,990.34

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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.