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Finding the Fourth Proportional to 239,383.80, 330,339.60 and 153,221.40

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Solution

The fourth proportional to 239,383.80, 330,339.60 and 153,221.40 is: 211,439.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    239,383.80 : 330,339.60 = 153,221.40 : x
  2. Step 2: Convert to fraction form
    239,383.80/330,339.60 = 153,221.40/x
  3. Step 3: Cross multiply
    239,383.80x = 330,339.60 × 153,221.40
  4. Step 4: Simplify right side
    239,383.80x = 50,615,095,987.44
  5. Step 5: Solve for x
    x = 50,615,095,987.44/239,383.80
  6. Step 6: Final answer
    x = 211,439.10

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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.