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Finding the Fourth Proportional to 435.75, 653.73 and 313.80

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Solution

The fourth proportional to 435.75, 653.73 and 313.80 is: 470.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    435.75 : 653.73 = 313.80 : x
  2. Step 2: Convert to fraction form
    435.75/653.73 = 313.80/x
  3. Step 3: Cross multiply
    435.75x = 653.73 × 313.80
  4. Step 4: Simplify right side
    435.75x = 205,136.85
  5. Step 5: Solve for x
    x = 205,136.85/435.75
  6. Step 6: Final answer
    x = 470.77

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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.