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Finding the Fourth Proportional to 479.68, 660 and 468.76

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Solution

The fourth proportional to 479.68, 660 and 468.76 is: 644.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    479.68 : 660 = 468.76 : x
  2. Step 2: Convert to fraction form
    479.68/660 = 468.76/x
  3. Step 3: Cross multiply
    479.68x = 660 × 468.76
  4. Step 4: Simplify right side
    479.68x = 309,381.60
  5. Step 5: Solve for x
    x = 309,381.60/479.68
  6. Step 6: Final answer
    x = 644.97

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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.