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Finding the Fourth Proportional to 393,120.63, 589,677.71 and 112,638.15

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Solution

The fourth proportional to 393,120.63, 589,677.71 and 112,638.15 is: 168,956.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,120.63 : 589,677.71 = 112,638.15 : x
  2. Step 2: Convert to fraction form
    393,120.63/589,677.71 = 112,638.15/x
  3. Step 3: Cross multiply
    393,120.63x = 589,677.71 × 112,638.15
  4. Step 4: Simplify right side
    393,120.63x = 66,420,205,787.45
  5. Step 5: Solve for x
    x = 66,420,205,787.45/393,120.63
  6. Step 6: Final answer
    x = 168,956.30

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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.