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Finding the Fourth Proportional to 479,629.76, 661,274.16 and 393,270.80

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Solution

The fourth proportional to 479,629.76, 661,274.16 and 393,270.80 is: 542,209.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    479,629.76 : 661,274.16 = 393,270.80 : x
  2. Step 2: Convert to fraction form
    479,629.76/661,274.16 = 393,270.80/x
  3. Step 3: Cross multiply
    479,629.76x = 661,274.16 × 393,270.80
  4. Step 4: Simplify right side
    479,629.76x = 260,059,817,922.53
  5. Step 5: Solve for x
    x = 260,059,817,922.53/479,629.76
  6. Step 6: Final answer
    x = 542,209.51

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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.