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Finding the Fourth Proportional to 470.66, 706.26 and 393.44

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Solution

The fourth proportional to 470.66, 706.26 and 393.44 is: 590.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    470.66 : 706.26 = 393.44 : x
  2. Step 2: Convert to fraction form
    470.66/706.26 = 393.44/x
  3. Step 3: Cross multiply
    470.66x = 706.26 × 393.44
  4. Step 4: Simplify right side
    470.66x = 277,870.93
  5. Step 5: Solve for x
    x = 277,870.93/470.66
  6. Step 6: Final answer
    x = 590.39

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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.