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Finding the Fourth Proportional to 482.70, 723.51 and 391.20

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Solution

The fourth proportional to 482.70, 723.51 and 391.20 is: 586.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    482.70 : 723.51 = 391.20 : x
  2. Step 2: Convert to fraction form
    482.70/723.51 = 391.20/x
  3. Step 3: Cross multiply
    482.70x = 723.51 × 391.20
  4. Step 4: Simplify right side
    482.70x = 283,037.11
  5. Step 5: Solve for x
    x = 283,037.11/482.70
  6. Step 6: Final answer
    x = 586.36

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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.