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Finding the Fourth Proportional to 315,120.60, 435,432.78 and 239,537.88

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Solution

The fourth proportional to 315,120.60, 435,432.78 and 239,537.88 is: 330,992.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,120.60 : 435,432.78 = 239,537.88 : x
  2. Step 2: Convert to fraction form
    315,120.60/435,432.78 = 239,537.88/x
  3. Step 3: Cross multiply
    315,120.60x = 435,432.78 × 239,537.88
  4. Step 4: Simplify right side
    315,120.60x = 104,302,645,003.71
  5. Step 5: Solve for x
    x = 104,302,645,003.71/315,120.60
  6. Step 6: Final answer
    x = 330,992.78

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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.