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Finding the Fourth Proportional to 644.67, 965.50 and 470.90

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Solution

The fourth proportional to 644.67, 965.50 and 470.90 is: 705.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    644.67 : 965.50 = 470.90 : x
  2. Step 2: Convert to fraction form
    644.67/965.50 = 470.90/x
  3. Step 3: Cross multiply
    644.67x = 965.50 × 470.90
  4. Step 4: Simplify right side
    644.67x = 454,655.19
  5. Step 5: Solve for x
    x = 454,655.19/644.67
  6. Step 6: Final answer
    x = 705.25

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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.