Home / 394,616.48-591,980.88-128,291.36

Finding the Fourth Proportional to 394,616.48, 591,980.88 and 128,291.36

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Solution

The fourth proportional to 394,616.48, 591,980.88 and 128,291.36 is: 192,455.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    394,616.48 : 591,980.88 = 128,291.36 : x
  2. Step 2: Convert to fraction form
    394,616.48/591,980.88 = 128,291.36/x
  3. Step 3: Cross multiply
    394,616.48x = 591,980.88 × 128,291.36
  4. Step 4: Simplify right side
    394,616.48x = 75,946,032,189.20
  5. Step 5: Solve for x
    x = 75,946,032,189.20/394,616.48
  6. Step 6: Final answer
    x = 192,455.30

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1.5x scale

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.