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Finding the Fourth Proportional to 479.04, 717.33 and 390.79

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Solution

The fourth proportional to 479.04, 717.33 and 390.79 is: 585.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    479.04 : 717.33 = 390.79 : x
  2. Step 2: Convert to fraction form
    479.04/717.33 = 390.79/x
  3. Step 3: Cross multiply
    479.04x = 717.33 × 390.79
  4. Step 4: Simplify right side
    479.04x = 280,325.39
  5. Step 5: Solve for x
    x = 280,325.39/479.04
  6. Step 6: Final answer
    x = 585.18

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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.