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Finding the Fourth Proportional to 447.93, 670.95 and 285.12

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Solution

The fourth proportional to 447.93, 670.95 and 285.12 is: 427.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    447.93 : 670.95 = 285.12 : x
  2. Step 2: Convert to fraction form
    447.93/670.95 = 285.12/x
  3. Step 3: Cross multiply
    447.93x = 670.95 × 285.12
  4. Step 4: Simplify right side
    447.93x = 191,301.26
  5. Step 5: Solve for x
    x = 191,301.26/447.93
  6. Step 6: Final answer
    x = 427.08

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.