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Finding the Fourth Proportional to 443,459.60, 665,189.40 and 127,926.80

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Solution

The fourth proportional to 443,459.60, 665,189.40 and 127,926.80 is: 191,890.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    443,459.60 : 665,189.40 = 127,926.80 : x
  2. Step 2: Convert to fraction form
    443,459.60/665,189.40 = 127,926.80/x
  3. Step 3: Cross multiply
    443,459.60x = 665,189.40 × 127,926.80
  4. Step 4: Simplify right side
    443,459.60x = 85,095,551,335.92
  5. Step 5: Solve for x
    x = 85,095,551,335.92/443,459.60
  6. Step 6: Final answer
    x = 191,890.20

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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.