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Finding the Fourth Proportional to 581.84, 872.96 and 418.61

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Solution

The fourth proportional to 581.84, 872.96 and 418.61 is: 628.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    581.84 : 872.96 = 418.61 : x
  2. Step 2: Convert to fraction form
    581.84/872.96 = 418.61/x
  3. Step 3: Cross multiply
    581.84x = 872.96 × 418.61
  4. Step 4: Simplify right side
    581.84x = 365,423.33
  5. Step 5: Solve for x
    x = 365,423.33/581.84
  6. Step 6: Final answer
    x = 628.05

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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.