Home / 421,815.20-632,538.48-126,258.08

Finding the Fourth Proportional to 421,815.20, 632,538.48 and 126,258.08

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Solution

The fourth proportional to 421,815.20, 632,538.48 and 126,258.08 is: 189,331.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    421,815.20 : 632,538.48 = 126,258.08 : x
  2. Step 2: Convert to fraction form
    421,815.20/632,538.48 = 126,258.08/x
  3. Step 3: Cross multiply
    421,815.20x = 632,538.48 × 126,258.08
  4. Step 4: Simplify right side
    421,815.20x = 79,863,094,010.92
  5. Step 5: Solve for x
    x = 79,863,094,010.92/421,815.20
  6. Step 6: Final answer
    x = 189,331.95

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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.