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Finding the Fourth Proportional to 484.62, 725.68 and 407.40

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Solution

The fourth proportional to 484.62, 725.68 and 407.40 is: 610.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    484.62 : 725.68 = 407.40 : x
  2. Step 2: Convert to fraction form
    484.62/725.68 = 407.40/x
  3. Step 3: Cross multiply
    484.62x = 725.68 × 407.40
  4. Step 4: Simplify right side
    484.62x = 295,642.03
  5. Step 5: Solve for x
    x = 295,642.03/484.62
  6. Step 6: Final answer
    x = 610.05

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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.