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Finding the Fourth Proportional to 479.02, 714.64 and 426.74

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Solution

The fourth proportional to 479.02, 714.64 and 426.74 is: 636.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    479.02 : 714.64 = 426.74 : x
  2. Step 2: Convert to fraction form
    479.02/714.64 = 426.74/x
  3. Step 3: Cross multiply
    479.02x = 714.64 × 426.74
  4. Step 4: Simplify right side
    479.02x = 304,963.34
  5. Step 5: Solve for x
    x = 304,963.34/479.02
  6. Step 6: Final answer
    x = 636.64

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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.