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Finding the Fourth Proportional to 628.35, 940.88 and 505.22

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Solution

The fourth proportional to 628.35, 940.88 and 505.22 is: 756.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    628.35 : 940.88 = 505.22 : x
  2. Step 2: Convert to fraction form
    628.35/940.88 = 505.22/x
  3. Step 3: Cross multiply
    628.35x = 940.88 × 505.22
  4. Step 4: Simplify right side
    628.35x = 475,344.16
  5. Step 5: Solve for x
    x = 475,344.16/628.35
  6. Step 6: Final answer
    x = 756.50

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1.5x scale

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.