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Finding the Fourth Proportional to 439.77, 607.02 and 434.30

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Solution

The fourth proportional to 439.77, 607.02 and 434.30 is: 599.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    439.77 : 607.02 = 434.30 : x
  2. Step 2: Convert to fraction form
    439.77/607.02 = 434.30/x
  3. Step 3: Cross multiply
    439.77x = 607.02 × 434.30
  4. Step 4: Simplify right side
    439.77x = 263,628.79
  5. Step 5: Solve for x
    x = 263,628.79/439.77
  6. Step 6: Final answer
    x = 599.47

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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.