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Finding the Fourth Proportional to 445, 664.80 and 372.10

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Solution

The fourth proportional to 445, 664.80 and 372.10 is: 555.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    445 : 664.80 = 372.10 : x
  2. Step 2: Convert to fraction form
    445/664.80 = 372.10/x
  3. Step 3: Cross multiply
    445x = 664.80 × 372.10
  4. Step 4: Simplify right side
    445x = 247,372.08
  5. Step 5: Solve for x
    x = 247,372.08/445
  6. Step 6: Final answer
    x = 555.89

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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.