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Finding the Fourth Proportional to 482.90, 723.76 and 287.98

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Solution

The fourth proportional to 482.90, 723.76 and 287.98 is: 431.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    482.90 : 723.76 = 287.98 : x
  2. Step 2: Convert to fraction form
    482.90/723.76 = 287.98/x
  3. Step 3: Cross multiply
    482.90x = 723.76 × 287.98
  4. Step 4: Simplify right side
    482.90x = 208,425.88
  5. Step 5: Solve for x
    x = 208,425.88/482.90
  6. Step 6: Final answer
    x = 431.62

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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.