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Finding the Fourth Proportional to 482.40, 725.40 and 403.20

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Solution

The fourth proportional to 482.40, 725.40 and 403.20 is: 606.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    482.40 : 725.40 = 403.20 : x
  2. Step 2: Convert to fraction form
    482.40/725.40 = 403.20/x
  3. Step 3: Cross multiply
    482.40x = 725.40 × 403.20
  4. Step 4: Simplify right side
    482.40x = 292,481.28
  5. Step 5: Solve for x
    x = 292,481.28/482.40
  6. Step 6: Final answer
    x = 606.30

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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.