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Finding the Fourth Proportional to 482.40, 723.60 and 239.40

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Solution

The fourth proportional to 482.40, 723.60 and 239.40 is: 359.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    482.40 : 723.60 = 239.40 : x
  2. Step 2: Convert to fraction form
    482.40/723.60 = 239.40/x
  3. Step 3: Cross multiply
    482.40x = 723.60 × 239.40
  4. Step 4: Simplify right side
    482.40x = 173,229.84
  5. Step 5: Solve for x
    x = 173,229.84/482.40
  6. Step 6: Final answer
    x = 359.10

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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.