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Finding the Fourth Proportional to 457.05, 684.20 and 294.40

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Solution

The fourth proportional to 457.05, 684.20 and 294.40 is: 440.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    457.05 : 684.20 = 294.40 : x
  2. Step 2: Convert to fraction form
    457.05/684.20 = 294.40/x
  3. Step 3: Cross multiply
    457.05x = 684.20 × 294.40
  4. Step 4: Simplify right side
    457.05x = 201,428.48
  5. Step 5: Solve for x
    x = 201,428.48/457.05
  6. Step 6: Final answer
    x = 440.71

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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.