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Finding the Fourth Proportional to 319,313.84, 440,488.19 and 198,409.19

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Solution

The fourth proportional to 319,313.84, 440,488.19 and 198,409.19 is: 273,702.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    319,313.84 : 440,488.19 = 198,409.19 : x
  2. Step 2: Convert to fraction form
    319,313.84/440,488.19 = 198,409.19/x
  3. Step 3: Cross multiply
    319,313.84x = 440,488.19 × 198,409.19
  4. Step 4: Simplify right side
    319,313.84x = 87,396,901,787.98
  5. Step 5: Solve for x
    x = 87,396,901,787.98/319,313.84
  6. Step 6: Final answer
    x = 273,702.21

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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.