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Finding the Fourth Proportional to 219,787.80, 330,410.70 and 190,919.40

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Solution

The fourth proportional to 219,787.80, 330,410.70 and 190,919.40 is: 287,012.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    219,787.80 : 330,410.70 = 190,919.40 : x
  2. Step 2: Convert to fraction form
    219,787.80/330,410.70 = 190,919.40/x
  3. Step 3: Cross multiply
    219,787.80x = 330,410.70 × 190,919.40
  4. Step 4: Simplify right side
    219,787.80x = 63,081,812,597.58
  5. Step 5: Solve for x
    x = 63,081,812,597.58/219,787.80
  6. Step 6: Final answer
    x = 287,012.35

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.