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Finding the Fourth Proportional to 439.67, 603.10 and 430.55

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Solution

The fourth proportional to 439.67, 603.10 and 430.55 is: 590.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    439.67 : 603.10 = 430.55 : x
  2. Step 2: Convert to fraction form
    439.67/603.10 = 430.55/x
  3. Step 3: Cross multiply
    439.67x = 603.10 × 430.55
  4. Step 4: Simplify right side
    439.67x = 259,664.71
  5. Step 5: Solve for x
    x = 259,664.71/439.67
  6. Step 6: Final answer
    x = 590.59

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.