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Finding the Fourth Proportional to 443.59, 660.93 and 418.75

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Solution

The fourth proportional to 443.59, 660.93 and 418.75 is: 623.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    443.59 : 660.93 = 418.75 : x
  2. Step 2: Convert to fraction form
    443.59/660.93 = 418.75/x
  3. Step 3: Cross multiply
    443.59x = 660.93 × 418.75
  4. Step 4: Simplify right side
    443.59x = 276,763.39
  5. Step 5: Solve for x
    x = 276,763.39/443.59
  6. Step 6: Final answer
    x = 623.92

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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.