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Finding the Fourth Proportional to 489,611.70, 675,490.89 and 319,944.24

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Solution

The fourth proportional to 489,611.70, 675,490.89 and 319,944.24 is: 441,409.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    489,611.70 : 675,490.89 = 319,944.24 : x
  2. Step 2: Convert to fraction form
    489,611.70/675,490.89 = 319,944.24/x
  3. Step 3: Cross multiply
    489,611.70x = 675,490.89 × 319,944.24
  4. Step 4: Simplify right side
    489,611.70x = 216,119,419,427.97
  5. Step 5: Solve for x
    x = 216,119,419,427.97/489,611.70
  6. Step 6: Final answer
    x = 441,409.83

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1.5x scale

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.