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Finding the Fourth Proportional to 658,630.72, 908,911.28 and 356,824.72

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Solution

The fourth proportional to 658,630.72, 908,911.28 and 356,824.72 is: 492,418.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    658,630.72 : 908,911.28 = 356,824.72 : x
  2. Step 2: Convert to fraction form
    658,630.72/908,911.28 = 356,824.72/x
  3. Step 3: Cross multiply
    658,630.72x = 908,911.28 × 356,824.72
  4. Step 4: Simplify right side
    658,630.72x = 324,322,012,990.84
  5. Step 5: Solve for x
    x = 324,322,012,990.84/658,630.72
  6. Step 6: Final answer
    x = 492,418.59

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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.