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Finding the Fourth Proportional to 585.74, 879.09 and 439.34

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Solution

The fourth proportional to 585.74, 879.09 and 439.34 is: 659.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    585.74 : 879.09 = 439.34 : x
  2. Step 2: Convert to fraction form
    585.74/879.09 = 439.34/x
  3. Step 3: Cross multiply
    585.74x = 879.09 × 439.34
  4. Step 4: Simplify right side
    585.74x = 386,219.40
  5. Step 5: Solve for x
    x = 386,219.40/585.74
  6. Step 6: Final answer
    x = 659.37

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1.5x scale

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.