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Finding the Fourth Proportional to 443,617.36, 665,228.40 and 127,999.28

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Solution

The fourth proportional to 443,617.36, 665,228.40 and 127,999.28 is: 191,941.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    443,617.36 : 665,228.40 = 127,999.28 : x
  2. Step 2: Convert to fraction form
    443,617.36/665,228.40 = 127,999.28/x
  3. Step 3: Cross multiply
    443,617.36x = 665,228.40 × 127,999.28
  4. Step 4: Simplify right side
    443,617.36x = 85,148,756,235.55
  5. Step 5: Solve for x
    x = 85,148,756,235.55/443,617.36
  6. Step 6: Final answer
    x = 191,941.89

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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.