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Finding the Fourth Proportional to 470.70, 706.68 and 465.21

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Solution

The fourth proportional to 470.70, 706.68 and 465.21 is: 698.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    470.70 : 706.68 = 465.21 : x
  2. Step 2: Convert to fraction form
    470.70/706.68 = 465.21/x
  3. Step 3: Cross multiply
    470.70x = 706.68 × 465.21
  4. Step 4: Simplify right side
    470.70x = 328,754.60
  5. Step 5: Solve for x
    x = 328,754.60/470.70
  6. Step 6: Final answer
    x = 698.44

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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.