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Finding the Fourth Proportional to 437.12, 603.36 and 279.80

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Solution

The fourth proportional to 437.12, 603.36 and 279.80 is: 386.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    437.12 : 603.36 = 279.80 : x
  2. Step 2: Convert to fraction form
    437.12/603.36 = 279.80/x
  3. Step 3: Cross multiply
    437.12x = 603.36 × 279.80
  4. Step 4: Simplify right side
    437.12x = 168,820.13
  5. Step 5: Solve for x
    x = 168,820.13/437.12
  6. Step 6: Final answer
    x = 386.21

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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.