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Finding the Fourth Proportional to 699.89, 965.57 and 451.35

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Solution

The fourth proportional to 699.89, 965.57 and 451.35 is: 622.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    699.89 : 965.57 = 451.35 : x
  2. Step 2: Convert to fraction form
    699.89/965.57 = 451.35/x
  3. Step 3: Cross multiply
    699.89x = 965.57 × 451.35
  4. Step 4: Simplify right side
    699.89x = 435,810.02
  5. Step 5: Solve for x
    x = 435,810.02/699.89
  6. Step 6: Final answer
    x = 622.68

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1.5x scale

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.