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Finding the Fourth Proportional to 646,900.78, 892,729.17 and 356,522.95

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Solution

The fourth proportional to 646,900.78, 892,729.17 and 356,522.95 is: 492,005.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    646,900.78 : 892,729.17 = 356,522.95 : x
  2. Step 2: Convert to fraction form
    646,900.78/892,729.17 = 356,522.95/x
  3. Step 3: Cross multiply
    646,900.78x = 892,729.17 × 356,522.95
  4. Step 4: Simplify right side
    646,900.78x = 318,278,437,239.45
  5. Step 5: Solve for x
    x = 318,278,437,239.45/646,900.78
  6. Step 6: Final answer
    x = 492,005.03

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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.