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Finding the Fourth Proportional to 479.74, 660.66 and 457.87

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Solution

The fourth proportional to 479.74, 660.66 and 457.87 is: 630.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    479.74 : 660.66 = 457.87 : x
  2. Step 2: Convert to fraction form
    479.74/660.66 = 457.87/x
  3. Step 3: Cross multiply
    479.74x = 660.66 × 457.87
  4. Step 4: Simplify right side
    479.74x = 302,496.39
  5. Step 5: Solve for x
    x = 302,496.39/479.74
  6. Step 6: Final answer
    x = 630.54

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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.