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Finding the Fourth Proportional to 325,618.60, 487,771.80 and 219,330.40

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Solution

The fourth proportional to 325,618.60, 487,771.80 and 219,330.40 is: 328,553.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    325,618.60 : 487,771.80 = 219,330.40 : x
  2. Step 2: Convert to fraction form
    325,618.60/487,771.80 = 219,330.40/x
  3. Step 3: Cross multiply
    325,618.60x = 487,771.80 × 219,330.40
  4. Step 4: Simplify right side
    325,618.60x = 106,983,184,002.72
  5. Step 5: Solve for x
    x = 106,983,184,002.72/325,618.60
  6. Step 6: Final answer
    x = 328,553.66

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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.