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Finding the Fourth Proportional to 446.20, 615.90 and 347.80

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Solution

The fourth proportional to 446.20, 615.90 and 347.80 is: 480.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    446.20 : 615.90 = 347.80 : x
  2. Step 2: Convert to fraction form
    446.20/615.90 = 347.80/x
  3. Step 3: Cross multiply
    446.20x = 615.90 × 347.80
  4. Step 4: Simplify right side
    446.20x = 214,210.02
  5. Step 5: Solve for x
    x = 214,210.02/446.20
  6. Step 6: Final answer
    x = 480.08

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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.