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Finding the Fourth Proportional to 261,321.60, 392,212.80 and 223,996.80

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Solution

The fourth proportional to 261,321.60, 392,212.80 and 223,996.80 is: 336,192.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,321.60 : 392,212.80 = 223,996.80 : x
  2. Step 2: Convert to fraction form
    261,321.60/392,212.80 = 223,996.80/x
  3. Step 3: Cross multiply
    261,321.60x = 392,212.80 × 223,996.80
  4. Step 4: Simplify right side
    261,321.60x = 87,854,412,119.04
  5. Step 5: Solve for x
    x = 87,854,412,119.04/261,321.60
  6. Step 6: Final answer
    x = 336,192.69

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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.