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Finding the Fourth Proportional to 439.79, 605.63 and 430.61

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Solution

The fourth proportional to 439.79, 605.63 and 430.61 is: 592.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    439.79 : 605.63 = 430.61 : x
  2. Step 2: Convert to fraction form
    439.79/605.63 = 430.61/x
  3. Step 3: Cross multiply
    439.79x = 605.63 × 430.61
  4. Step 4: Simplify right side
    439.79x = 260,788.38
  5. Step 5: Solve for x
    x = 260,788.38/439.79
  6. Step 6: Final answer
    x = 592.99

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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.