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Finding the Fourth Proportional to 443,383.02, 665,172.93 and 127,815.30

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Solution

The fourth proportional to 443,383.02, 665,172.93 and 127,815.30 is: 191,751.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    443,383.02 : 665,172.93 = 127,815.30 : x
  2. Step 2: Convert to fraction form
    443,383.02/665,172.93 = 127,815.30/x
  3. Step 3: Cross multiply
    443,383.02x = 665,172.93 × 127,815.30
  4. Step 4: Simplify right side
    443,383.02x = 85,019,277,599.83
  5. Step 5: Solve for x
    x = 85,019,277,599.83/443,383.02
  6. Step 6: Final answer
    x = 191,751.32

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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.