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Finding the Fourth Proportional to 393,069.81, 589,616.26 and 108,762.70

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Solution

The fourth proportional to 393,069.81, 589,616.26 and 108,762.70 is: 163,147.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,069.81 : 589,616.26 = 108,762.70 : x
  2. Step 2: Convert to fraction form
    393,069.81/589,616.26 = 108,762.70/x
  3. Step 3: Cross multiply
    393,069.81x = 589,616.26 × 108,762.70
  4. Step 4: Simplify right side
    393,069.81x = 64,128,256,372.88
  5. Step 5: Solve for x
    x = 64,128,256,372.88/393,069.81
  6. Step 6: Final answer
    x = 163,147.24

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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.