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Finding the Fourth Proportional to 445.90, 614.91 and 347.62

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Solution

The fourth proportional to 445.90, 614.91 and 347.62 is: 479.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    445.90 : 614.91 = 347.62 : x
  2. Step 2: Convert to fraction form
    445.90/614.91 = 347.62/x
  3. Step 3: Cross multiply
    445.90x = 614.91 × 347.62
  4. Step 4: Simplify right side
    445.90x = 213,755.01
  5. Step 5: Solve for x
    x = 213,755.01/445.90
  6. Step 6: Final answer
    x = 479.38

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1.5x scale

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.