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Finding the Fourth Proportional to 682.60, 946.99 and 653.80

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Solution

The fourth proportional to 682.60, 946.99 and 653.80 is: 907.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    682.60 : 946.99 = 653.80 : x
  2. Step 2: Convert to fraction form
    682.60/946.99 = 653.80/x
  3. Step 3: Cross multiply
    682.60x = 946.99 × 653.80
  4. Step 4: Simplify right side
    682.60x = 619,142.06
  5. Step 5: Solve for x
    x = 619,142.06/682.60
  6. Step 6: Final answer
    x = 907.03

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.