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Finding the Fourth Proportional to 479.55, 716.10 and 393.06

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Solution

The fourth proportional to 479.55, 716.10 and 393.06 is: 586.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    479.55 : 716.10 = 393.06 : x
  2. Step 2: Convert to fraction form
    479.55/716.10 = 393.06/x
  3. Step 3: Cross multiply
    479.55x = 716.10 × 393.06
  4. Step 4: Simplify right side
    479.55x = 281,470.27
  5. Step 5: Solve for x
    x = 281,470.27/479.55
  6. Step 6: Final answer
    x = 586.95

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.