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Finding the Fourth Proportional to 325,189.55, 487,450.78 and 125,431.40

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Solution

The fourth proportional to 325,189.55, 487,450.78 and 125,431.40 is: 188,018.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    325,189.55 : 487,450.78 = 125,431.40 : x
  2. Step 2: Convert to fraction form
    325,189.55/487,450.78 = 125,431.40/x
  3. Step 3: Cross multiply
    325,189.55x = 487,450.78 × 125,431.40
  4. Step 4: Simplify right side
    325,189.55x = 61,141,634,671.54
  5. Step 5: Solve for x
    x = 61,141,634,671.54/325,189.55
  6. Step 6: Final answer
    x = 188,018.45

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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.