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Finding the Fourth Proportional to 318,965.45, 478,491.91 and 94,343.54

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Solution

The fourth proportional to 318,965.45, 478,491.91 and 94,343.54 is: 141,528.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,965.45 : 478,491.91 = 94,343.54 : x
  2. Step 2: Convert to fraction form
    318,965.45/478,491.91 = 94,343.54/x
  3. Step 3: Cross multiply
    318,965.45x = 478,491.91 × 94,343.54
  4. Step 4: Simplify right side
    318,965.45x = 45,142,618,022.44
  5. Step 5: Solve for x
    x = 45,142,618,022.44/318,965.45
  6. Step 6: Final answer
    x = 141,528.24

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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.