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Finding the Fourth Proportional to 443,548.21, 665,312.74 and 123,691.56

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Solution

The fourth proportional to 443,548.21, 665,312.74 and 123,691.56 is: 185,534.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    443,548.21 : 665,312.74 = 123,691.56 : x
  2. Step 2: Convert to fraction form
    443,548.21/665,312.74 = 123,691.56/x
  3. Step 3: Cross multiply
    443,548.21x = 665,312.74 × 123,691.56
  4. Step 4: Simplify right side
    443,548.21x = 82,293,570,080.02
  5. Step 5: Solve for x
    x = 82,293,570,080.02/443,548.21
  6. Step 6: Final answer
    x = 185,534.67

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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.