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Finding the Fourth Proportional to 379,478.81, 523,630.16 and 243,696.68

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Solution

The fourth proportional to 379,478.81, 523,630.16 and 243,696.68 is: 336,268.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    379,478.81 : 523,630.16 = 243,696.68 : x
  2. Step 2: Convert to fraction form
    379,478.81/523,630.16 = 243,696.68/x
  3. Step 3: Cross multiply
    379,478.81x = 523,630.16 × 243,696.68
  4. Step 4: Simplify right side
    379,478.81x = 127,606,930,321.39
  5. Step 5: Solve for x
    x = 127,606,930,321.39/379,478.81
  6. Step 6: Final answer
    x = 336,268.92

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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.