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Finding the Fourth Proportional to 582.21, 872.19 and 307.80

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Solution

The fourth proportional to 582.21, 872.19 and 307.80 is: 461.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    582.21 : 872.19 = 307.80 : x
  2. Step 2: Convert to fraction form
    582.21/872.19 = 307.80/x
  3. Step 3: Cross multiply
    582.21x = 872.19 × 307.80
  4. Step 4: Simplify right side
    582.21x = 268,460.08
  5. Step 5: Solve for x
    x = 268,460.08/582.21
  6. Step 6: Final answer
    x = 461.11

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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.