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Finding the Fourth Proportional to 445.80, 614.94 and 347.40

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Solution

The fourth proportional to 445.80, 614.94 and 347.40 is: 479.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    445.80 : 614.94 = 347.40 : x
  2. Step 2: Convert to fraction form
    445.80/614.94 = 347.40/x
  3. Step 3: Cross multiply
    445.80x = 614.94 × 347.40
  4. Step 4: Simplify right side
    445.80x = 213,630.16
  5. Step 5: Solve for x
    x = 213,630.16/445.80
  6. Step 6: Final answer
    x = 479.21

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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.