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Finding the Fourth Proportional to 479.49, 719.28 and 425.16

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Solution

The fourth proportional to 479.49, 719.28 and 425.16 is: 637.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    479.49 : 719.28 = 425.16 : x
  2. Step 2: Convert to fraction form
    479.49/719.28 = 425.16/x
  3. Step 3: Cross multiply
    479.49x = 719.28 × 425.16
  4. Step 4: Simplify right side
    479.49x = 305,805.49
  5. Step 5: Solve for x
    x = 305,805.49/479.49
  6. Step 6: Final answer
    x = 637.78

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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.