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Finding the Fourth Proportional to 309,636.56, 427,276.68 and 173,660.24

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Solution

The fourth proportional to 309,636.56, 427,276.68 and 173,660.24 is: 239,638.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    309,636.56 : 427,276.68 = 173,660.24 : x
  2. Step 2: Convert to fraction form
    309,636.56/427,276.68 = 173,660.24/x
  3. Step 3: Cross multiply
    309,636.56x = 427,276.68 × 173,660.24
  4. Step 4: Simplify right side
    309,636.56x = 74,200,970,795.20
  5. Step 5: Solve for x
    x = 74,200,970,795.20/309,636.56
  6. Step 6: Final answer
    x = 239,638.92

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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.