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Finding the Fourth Proportional to 482.19, 723.39 and 405.87

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Solution

The fourth proportional to 482.19, 723.39 and 405.87 is: 608.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    482.19 : 723.39 = 405.87 : x
  2. Step 2: Convert to fraction form
    482.19/723.39 = 405.87/x
  3. Step 3: Cross multiply
    482.19x = 723.39 × 405.87
  4. Step 4: Simplify right side
    482.19x = 293,602.30
  5. Step 5: Solve for x
    x = 293,602.30/482.19
  6. Step 6: Final answer
    x = 608.89

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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.