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Finding the Fourth Proportional to 325,196.40, 487,211.40 and 278,540.40

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Solution

The fourth proportional to 325,196.40, 487,211.40 and 278,540.40 is: 417,311.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    325,196.40 : 487,211.40 = 278,540.40 : x
  2. Step 2: Convert to fraction form
    325,196.40/487,211.40 = 278,540.40/x
  3. Step 3: Cross multiply
    325,196.40x = 487,211.40 × 278,540.40
  4. Step 4: Simplify right side
    325,196.40x = 135,708,058,240.56
  5. Step 5: Solve for x
    x = 135,708,058,240.56/325,196.40
  6. Step 6: Final answer
    x = 417,311.07

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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.