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Finding the Fourth Proportional to 716.45, 988.39 and 451.00

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Solution

The fourth proportional to 716.45, 988.39 and 451.00 is: 622.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    716.45 : 988.39 = 451.00 : x
  2. Step 2: Convert to fraction form
    716.45/988.39 = 451.00/x
  3. Step 3: Cross multiply
    716.45x = 988.39 × 451.00
  4. Step 4: Simplify right side
    716.45x = 445,763.15
  5. Step 5: Solve for x
    x = 445,763.15/716.45
  6. Step 6: Final answer
    x = 622.19

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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.