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Finding the Fourth Proportional to 445.68, 669.60 and 283.68

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Solution

The fourth proportional to 445.68, 669.60 and 283.68 is: 426.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    445.68 : 669.60 = 283.68 : x
  2. Step 2: Convert to fraction form
    445.68/669.60 = 283.68/x
  3. Step 3: Cross multiply
    445.68x = 669.60 × 283.68
  4. Step 4: Simplify right side
    445.68x = 189,952.13
  5. Step 5: Solve for x
    x = 189,952.13/445.68
  6. Step 6: Final answer
    x = 426.21

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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.