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Finding the Fourth Proportional to 445.49, 614.04 and 347.07

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Solution

The fourth proportional to 445.49, 614.04 and 347.07 is: 478.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    445.49 : 614.04 = 347.07 : x
  2. Step 2: Convert to fraction form
    445.49/614.04 = 347.07/x
  3. Step 3: Cross multiply
    445.49x = 614.04 × 347.07
  4. Step 4: Simplify right side
    445.49x = 213,114.86
  5. Step 5: Solve for x
    x = 213,114.86/445.49
  6. Step 6: Final answer
    x = 478.38

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Double scale
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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.