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Finding the Fourth Proportional to 437.99, 605.19 and 313.43

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Solution

The fourth proportional to 437.99, 605.19 and 313.43 is: 433.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    437.99 : 605.19 = 313.43 : x
  2. Step 2: Convert to fraction form
    437.99/605.19 = 313.43/x
  3. Step 3: Cross multiply
    437.99x = 605.19 × 313.43
  4. Step 4: Simplify right side
    437.99x = 189,681.68
  5. Step 5: Solve for x
    x = 189,681.68/437.99
  6. Step 6: Final answer
    x = 433.08

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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.