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Finding the Fourth Proportional to 470.70, 648.84 and 395.98

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Solution

The fourth proportional to 470.70, 648.84 and 395.98 is: 545.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    470.70 : 648.84 = 395.98 : x
  2. Step 2: Convert to fraction form
    470.70/648.84 = 395.98/x
  3. Step 3: Cross multiply
    470.70x = 648.84 × 395.98
  4. Step 4: Simplify right side
    470.70x = 256,926.04
  5. Step 5: Solve for x
    x = 256,926.04/470.70
  6. Step 6: Final answer
    x = 545.84

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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.