Home / 394,947.36-592,462.76-128,728.72

Finding the Fourth Proportional to 394,947.36, 592,462.76 and 128,728.72

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Solution

The fourth proportional to 394,947.36, 592,462.76 and 128,728.72 is: 193,106.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    394,947.36 : 592,462.76 = 128,728.72 : x
  2. Step 2: Convert to fraction form
    394,947.36/592,462.76 = 128,728.72/x
  3. Step 3: Cross multiply
    394,947.36x = 592,462.76 × 128,728.72
  4. Step 4: Simplify right side
    394,947.36x = 76,266,972,742.47
  5. Step 5: Solve for x
    x = 76,266,972,742.47/394,947.36
  6. Step 6: Final answer
    x = 193,106.68

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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.