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Finding the Fourth Proportional to 445.21, 614.43 and 297.91

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Solution

The fourth proportional to 445.21, 614.43 and 297.91 is: 411.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    445.21 : 614.43 = 297.91 : x
  2. Step 2: Convert to fraction form
    445.21/614.43 = 297.91/x
  3. Step 3: Cross multiply
    445.21x = 614.43 × 297.91
  4. Step 4: Simplify right side
    445.21x = 183,044.84
  5. Step 5: Solve for x
    x = 183,044.84/445.21
  6. Step 6: Final answer
    x = 411.14

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.