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Finding the Fourth Proportional to 439.11, 607.91 and 430.79

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Solution

The fourth proportional to 439.11, 607.91 and 430.79 is: 596.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    439.11 : 607.91 = 430.79 : x
  2. Step 2: Convert to fraction form
    439.11/607.91 = 430.79/x
  3. Step 3: Cross multiply
    439.11x = 607.91 × 430.79
  4. Step 4: Simplify right side
    439.11x = 261,876.36
  5. Step 5: Solve for x
    x = 261,876.36/439.11
  6. Step 6: Final answer
    x = 596.38

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Double scale
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1.5x scale

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.