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Finding the Fourth Proportional to 217,279.60, 325,810.05 and 128,560.30

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Solution

The fourth proportional to 217,279.60, 325,810.05 and 128,560.30 is: 192,775.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    217,279.60 : 325,810.05 = 128,560.30 : x
  2. Step 2: Convert to fraction form
    217,279.60/325,810.05 = 128,560.30/x
  3. Step 3: Cross multiply
    217,279.60x = 325,810.05 × 128,560.30
  4. Step 4: Simplify right side
    217,279.60x = 41,886,237,771.02
  5. Step 5: Solve for x
    x = 41,886,237,771.02/217,279.60
  6. Step 6: Final answer
    x = 192,775.75

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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.