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Finding the Fourth Proportional to 445.10, 670.68 and 365.72

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Solution

The fourth proportional to 445.10, 670.68 and 365.72 is: 551.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    445.10 : 670.68 = 365.72 : x
  2. Step 2: Convert to fraction form
    445.10/670.68 = 365.72/x
  3. Step 3: Cross multiply
    445.10x = 670.68 × 365.72
  4. Step 4: Simplify right side
    445.10x = 245,277.74
  5. Step 5: Solve for x
    x = 245,277.74/445.10
  6. Step 6: Final answer
    x = 551.07

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.