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Finding the Fourth Proportional to 443.34, 660.55 and 418.50

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Solution

The fourth proportional to 443.34, 660.55 and 418.50 is: 623.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    443.34 : 660.55 = 418.50 : x
  2. Step 2: Convert to fraction form
    443.34/660.55 = 418.50/x
  3. Step 3: Cross multiply
    443.34x = 660.55 × 418.50
  4. Step 4: Simplify right side
    443.34x = 276,440.18
  5. Step 5: Solve for x
    x = 276,440.18/443.34
  6. Step 6: Final answer
    x = 623.54

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.