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Finding the Fourth Proportional to 421,199.48, 581,255.16 and 239,928.20

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Solution

The fourth proportional to 421,199.48, 581,255.16 and 239,928.20 is: 331,100.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    421,199.48 : 581,255.16 = 239,928.20 : x
  2. Step 2: Convert to fraction form
    421,199.48/581,255.16 = 239,928.20/x
  3. Step 3: Cross multiply
    421,199.48x = 581,255.16 × 239,928.20
  4. Step 4: Simplify right side
    421,199.48x = 139,459,504,279.51
  5. Step 5: Solve for x
    x = 139,459,504,279.51/421,199.48
  6. Step 6: Final answer
    x = 331,100.85

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.