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Finding the Fourth Proportional to 479,234.88, 661,134.42 and 315,679.95

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Solution

The fourth proportional to 479,234.88, 661,134.42 and 315,679.95 is: 435,500.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    479,234.88 : 661,134.42 = 315,679.95 : x
  2. Step 2: Convert to fraction form
    479,234.88/661,134.42 = 315,679.95/x
  3. Step 3: Cross multiply
    479,234.88x = 661,134.42 × 315,679.95
  4. Step 4: Simplify right side
    479,234.88x = 208,706,880,648.88
  5. Step 5: Solve for x
    x = 208,706,880,648.88/479,234.88
  6. Step 6: Final answer
    x = 435,500.19

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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.